Task 1. “Type Annelida”
Write down the question numbers and answer in one sentence:
Number of species and habitats of annelids?
What classes of annelids do you know?
How does metamerism manifest itself in the external structure of annelids?
What is the dermal-muscular sac of annelids formed by?
What is the body cavity of an annelid worm called?
How many pairs of setae are there in one body segment of an earthworm?
What sections that were absent in roundworms appear in the digestive system of annelids?
What caused the absorption surface of the intestine to increase?
Through which vessel does blood move from the anterior end of the body to the posterior?
Which organs of the circulatory system provide blood movement? Where are they located?
What organs of movement appeared in polychaete worms on the sides of each segment?
What are the names of the excretory organs of annelids?
What is the nervous system of annelids?
What is the development of oligochaete worms?
What is the development of polychaete worms?
What is the name of the larva of polychaete worms?
From which group of animals did annelids originate?
Task 2. “Structure diagram of a polychaete”
How does the body cavity of an annelid worm differ from the body cavity of roundworms?
Z
Adaniya 3. “Structure diagram of metanephridia”
Look at the picture and answer the questions:
What is indicated in the figure by numbers 1 – 2?
What is the function of the convoluted tubule?
Task 4. “Annelids”
Write down the numbers of the judgments, put + against the correct ones, and – against the erroneous ones.
Bilaterally symmetrical three-layered animals.
There is no body cavity, the space between the internal organs is filled with parenchyma.
Primary body cavity (schizocoel).
The body cavity is secondary (coelom).
The body cavity is mixed (mixocoel).
The body is segmented.
There is no circulatory system.
The circulatory system is of an open type.
Closed circulatory system.
Breathing through the surface of the body; a number of species develop dorsal cutaneous gills.
The excretory system is of the protonephridial type, represented by cells with “flickering flames”, channels and pores.
The excretory system is of the metanephridial type, represented by paired tubes with a wide funnel with cilia along the edges.
The nervous system is represented by the peripharyngeal ganglia and the ventral nerve cord.
Some species have primitive limbs - blade-shaped outgrowths of the body with bristles.
Task 5. “Transverse and longitudinal sections of an earthworm”
Look at the picture and answer the questions:
What is indicated in the figure by numbers 1 – 14?
What is the skin-muscle sac formed by?
How many funnels of the excretory system are there in one segment?
How many pairs of bristles are located on one segment?
Task 6. “Structure of an earthworm”
Look at the picture and answer the questions:
What is indicated in the figure by numbers 1 – 11?
Where are the annular vessels that perform the function of the hearts?
Through which vessel does blood move to the front of the body?
Task 7. “Type Annelids”
Write down the test numbers, against each - the correct answer options
**Test 1. What is characteristic of the musculocutaneous sac of annelids:
A cuticle forms on the surface of the body.
The cuticle is missing.
Under the cuticle is the hypodermis.
Under the cuticle is a dermal single-layer epithelium.
Under the cuticle is the dermal stratified epithelium.
On the outside there is a layer of longitudinal muscles, underneath there is a layer of circular muscles.
On the outside there is a layer of circular muscles, under it there is a layer of longitudinal muscles.
The body cavity is lined with its own internal epithelium.
Body cavity without epithelial lining.
**Test 2. What is characteristic of the circulatory system of annelids:
Unclosed circulatory system.
Closed circulatory system.
Blood moves through the dorsal vessel to the back, and through the abdominal vessel to the front of the body.
Blood moves through the dorsal vessel to the front, and through the abdominal vessel to the back of the body.
The movement of blood is carried out due to contractions of the heart.
The movement of blood is carried out due to the contraction of annular vessels in segments 7–13.
Blood transports oxygen.
Blood transports nutrients.
Test 3. What is characteristic of the nervous system of annelids:
Nervous system of diffuse type.
The nervous system consists of two peripharyngeal rings with suprapharyngeal and subpharyngeal nodes and an abdominal nerve chain consisting of nodes close together in pairs.
The nervous system is of a scattered-nodular type.
The nervous system consists of two main trunks - the dorsal and abdominal and peripharyngeal ring with the suprapharyngeal and subpharyngeal nodes.
Test 4. What is characteristic of the excretory system of annelids:
Absent, secretion occurs with the help of contractile vacuoles in cells.
Represented by metanephridia.
It is formed by cells with “flickering flames”, channels and excretory pores.
It is formed by buds located in pairs in each segment.
Test 5. Annelids descended from the ancients:
Protozoa.
Coelenterates.
Roundworms.
Free-living flatworms.
Test 6. Unlike roundworms, annelids have:
Digestive system.
Excretory system.
Circulatory system.
Nervous system.
**Test 7. What is characteristic of the reproductive system and reproduction of earthworms?
Earthworms are hermaphrodites.
Earthworms are dioecious organisms.
Development with the larva.
Development is direct, a small worm emerges from the egg.
Fertilization is internal.
Fertilization occurs in the coupling.
**Test 8. What is characteristic of the earthworm’s digestive system?
They have a mouth with horny jaws.
There is a pharynx, esophagus, crop and stomach.
The ducts of the calcareous glands flow into the esophagus.
The intestine has a typhlosol on the dorsal side - a fold that increases the absorption surface.
The liver ducts open into the intestines.
Test 9. On each segment, except the head and anal, there is:
One pair of bristles.
Two pairs of bristles.
Three pairs of bristles.
Four pairs of bristles.
Task 8. “The most important terms and concepts of the topic”
Define the terms or expand on the concepts (in one sentence, emphasizing the most important features):
1. Three-layer animals. 2. Overall. 3. Coelomic bags. 4. Skin gills. 5. Metanephridia. 6. Parapodia. 9. Typhlosol.
Answers:
Exercise 1. 1. 12,000 species, seas, fresh water bodies, soil. 2. Polychaetes, oligochaetes, leeches. 3. In body segmentation, the body consists of a head lobe, a segmented trunk and an anal lobe. 4. Cuticle; single-layer epithelium, circular and longitudinal muscles. 5. Secondary, general. 6. Four pairs. 7. Goiter, stomach. 8. Due to the fold on the dorsal side of the intestine (typhlosol). 9. Along the back. 10. Ring vessels in segments 7 – 13. 11. Parapodia with tufts of bristles. 12. Metanephridia. 13. Periopharyngeal ring, suprapharyngeal and subpharyngeal nerve nodes and abdominal nerve chain of pairs of nerve nodes close together. 14. Direct. 15. With metamorphosis. 16. Trochophore. 17. From free-living flatworms.
Task 2. 1 – single-layer epithelium; 2 – dorsal blood vessel; 3 – circular muscles; 4 – longitudinal muscles; 5 – gill; 6 – supporting bristle; 7 – funnel of nephridium; 8 – abdominal barbel; 9 – nephridium channel; 10 – ovary; 11 – abdominal nerve chain; 12 – abdominal blood vessel; 13 – intestinal cavity; 14 – secondary cavity, whole. 2. The primary cavity does not have an epithelial lining, but is generally lined with epithelium.
Task 3. 1. 1 – metanephridial funnel; 2 – convoluted tubule; 3 – capillary network entwining the tubule, 4 – bladder; 5 – excretory time. 2. Reabsorbs and returns necessary substances to the blood.
Task 4. 1 – yes. 2 – no. 3 – no. 4 – yes. 5 – no. 6 – yes. 7 – no. 8 – no. 9 – yes. 10 – yes. 11 – no. 12 – yes. 13 – no. 14 – no. 15 – yes. 16 – yes. 17 – no.
Task 5. 1. 1 – cuticle; 2 – ring blood vessel; 3 – dorsal blood vessel; 4 – endothelial lining of the coelom; 5 – eggs; 6 – metanephridial funnel; 7 – circular muscles; 8 – longitudinal muscles; 9 – abdominal blood vessel; 10 – abdominal nerve chain; 11 – secondary body cavity, whole; 12 – single-layer epithelium; 13 – metanephridium channel; 14 – intestine. 2. Cuticle, single-layer epithelium, circular and longitudinal muscles. 3. Two. 4. Four pairs.
Task 6. 1. 1 – mouth; 2 – pharynx; 3 – annular vessels that perform the function of the hearts; 4 – esophagus; 5 – goiter; 6 – stomach; 7 – dorsal blood vessel; 8 – abdominal blood vessel; 9 – intestine; 10 – abdominal nerve chain; 11 – peripharyngeal ring. 2. Near the esophagus. 3. Along the dorsal.
Task 7.**Test 1: 1, 4, 7, 8. **Test 2: 2, 4, 6 7, 8. Test 3: 2. Test 4: 2. Test 5: 4. Test 6: 3. **Test 7: 1, 4, 6. **Test 8: 2, 3, 4. Test 9: 4.
Task 8. 1. Animals that have developed a third germ layer - mesoderm. 2. Secondary body cavity, which has its own mesodermal lining. 3. Each segment has two coelomic cavities lined with endothelium. 4. Outgrowths of the epithelium, which contain a large number of capillaries. 5. Organs of excretion, formed by a funnel with cilia, a canal, a bladder and sometimes opening outward. 6. Skin-muscular outgrowths on the sides of the body of polychaetes, an organ of movement, touch; in many, the dorsal antennae grows and becomes a gill. 9. A fold on the upper side of the intestine that increases the absorption surface.
Option 1.
1) in the body of the main host; 2) in the body of an intermediate host; 3) in the ground-air environment; 4) soil and aquatic environment.
2. Radial symmetry of the bodydoes not have:
1) jellyfish – corner mouth; 2) white planaria; 3) freshwater hydra; 4) red coral.
1) equipped with cilia; 2) covered with scales; 3) consist of chitin; 4) are not dissolved by the digestive juices of the host.
4. What type of animals are those that do not have a body cavity, and the spaces between the organs are filled with loose connective tissue:
1) roundworms; 2) annelids; 3) arthropods; 4) flatworms.
5. A free-living species is:
1) planaria; 2) wide tape; 3) echinococcus; 4) cat fluke.
6. Roundwormsare not deleted from the intestines along with undigested food, because:
1) have great fertility; 2) can live in an oxygen-free environment; 3) capable
move in the direction opposite to the movement of food;
4) the integument of their body is not affected by digestive juice.
7. The digestive system of the human roundworm, in contrast to flatworms:
1) lacks intestines; 2) lacks an oral opening; 3) has an anus;
4) lacks an anus.
8. In the skin-muscle sac of the roundworm, the muscles are represented by:
1) only circular muscles; 2) only oblique muscles; 3) only longitudinal muscles;
4) all of the listed muscle types.
9. Digestion earthworms of plant residues contributes to:
1) mixing the soil; 2) penetration of air into the soil; 3) enrichment of soil with organic
substances; 4) penetration of moisture into the soil.
10. What type of animals have the highest level of organization:
1) coelenterates; 2) flatworms; 3) annelids; 4) roundworms.
Part B
1. Establish a correspondence between groups of animals and their characteristic features:
A) Flatworms
B) Roundworms
1) there is a body cavity
2) no body cavity
3) the intestines end blindly
4) the intestine ends with the anus
5) characterized by a life cycle with one host
6) characterized by a life cycle with a change of hosts
Test Grade 7 Topic “Worms: Flat, Round, Ringed”
Option 2.
Part A (choice one correct answer)
Which animal is the intermediate host of the liver fluke:
1) dog; 2) person; 3) cow; 4) small pond snail.
Human infection with bovine tapeworm can occur when:
3. The interaction between a person and a bull tapeworm is called:
4. The body wall of flatworms is represented by:
1) only by skin; 2) external chitinous skeleton; 3) sink; 4) skin-muscle bag.
5. The internal organs of the white planaria are placed:
1) in the primary body cavity; 2) in the secondary body cavity; 3) in loose connective tissue; 4) in the intestinal cavity.
6. Multicellular, bilaterally symmetrical animals of an elongated shape, not divided into segments, having a body cavity, are classified as:
1) flatworms; 2) roundworms; 3) coelenterates; 4) annelids.
7. Infection with human roundworm occurs when:
1) eating raw meat; 2) eating raw fish; 3) failure to comply with personal hygiene standards;
4) infection of wounds and cuts.
8. During the transition from flatworms to roundworms, the following aromorphoses (complications) occurred:
1) a body cavity appeared; 2) a circulatory system appeared; 3) respiratory organs appeared;
4) specialized organs of movement appeared.
9. Unlike flatworms and roundworms, annelids have:
1) nervous system; 2) circulatory system; 3) excretory system; 4) digestive system.
10. The excretory system of annelids is represented by:
1) excretory glands; 2) paired kidneys in each body segment; 3) paired
excretory funnels in each body segment; 4) in each segment of the body by skin glands.
Part B Choose three correct statements out of six.
1. The signs of annelids include:
1) peripharyngeal nerve ring and nerve trunks with branches extending from it
2) bristles on body segments
3) peripharyngeal nerve ring and ventral nerve cord
4) poor development or absence of sensory organs
5) the presence of a closed circulatory system
6) nutrition of tissues of human body organs
Test Grade 7 Topic “Worms: Flat, Round, Ringed”
Option 3.
Part A (choice one correct answer)
Planarian respiration occurs:
1) diffusely through the integument of the body; 2) with the help of external outgrowths - gills; 3) using internal gills; 4) using pulmonary sacs.
2. The main host of the bovine tapeworm is:
1) bull; 2) person; 3) sheep; 4) horse.
3. The intermediate host of the liver fluke is:
1) bull; 2) person; 3) fish; 4) pond snail mollusk.
4. Who are classified as eyelash worms:
1) bovine tapeworm; 2) pork tapeworm; 3) echinococcus; 4) milky white planaria.
1) eyes appeared; 2) hermaphroditism arose; 3) the anal opening was reduced; 4) organs of attachment to the host body emerged.
6. In roundworms, unlike flatworms, the body cavity is filled with:
1) blood; 2) air; 3) liquid; 4) parenchyma (connective tissue).
1) stomach; 2) small intestine; 3) liver; 4) large intestine.
8. Which groups of animals do not use oxygen in the process of breathing:
1) earthworms and other soil inhabitants; 2) larvae of insects living under
sea depths.
9. The nervous system of an earthworm is represented by:
1) nerve cells scattered throughout the body; 2) peripharyngeal nerve
ring and ventral nerve cord; 3) cephalic nerve ganglia and outgoing
from them with trunks; 4) peripharyngeal nerve ring, dorsal and ventral
trunks.
10. Earthworms,making tunnels in the soil :
1) promote the formation of organic substances in plants; 2) improve conditions
root breathing; 3) affect the speed of movement in mineral plants
substances; 4) affect the speed of movement of organic substances in plants.
Part B
1. Establish a correspondence between the characteristic and the type of living organisms:
A) Coelenterates
B) Annelids
1) two-layer animals
2) the presence of a body cavity filled with fluid
3) reticular nervous system (diffuse type)
4) the body is segmented
5) radial symmetry
6) presence of a circulatory system
2. Name the worm. Specify the type and class to which it belongs.
Test Grade 7 Topic “Worms: Flat, Round, Ringed”
Option 4.
Part A (choice one correct answer)
Nervous system of flatworms:
1) diffuse type; 2) ladder type; 3) tubular type; 4) absent.
2. Finna (larva) of the bovine tapeworm usually develops:
1) in the external environment; 2) in the muscles and internal organs of a person; 3) in the muscles and internal organs of the cow; 4) in the muscles and internal organs of the dog.
3. Inhabits the small intestine, does not have a developed digestive system:
1) white planaria; 2) bovine tapeworm; 3) liver fluke; 4) cat fluke.
4. In the development cycle of flatworms, a change of hosts is observed. Where does the development cycle take place? liver fluke:
1) in the organisms of the small pond snail and cattle; 2) in the bodies of cattle and humans; 3) in the bodies of farm animals and dogs; 4) all answers are wrong.
5. Which of the following animals does not have an anus:
1) roundworm; 2) pinworm; 3) white planaria; 4) earthworm.
6. Roundworms lack:
1) body cavity; 2) excretory system; 3) nervous system; 4) circulatory system.
7. Bodydivided on the joints of:
1) coelenterates; 2) sponges; 3) roundworms; 4) annelids.
8. Which of the following animals has a round body:
1) human roundworm; 2) liver fluke; 3) bovine tapeworm; 4) Siberian fluke.
9. Annelids have muscles:
1) circular and longitudinal; 2) only circular; 3) only longitudinal; 4) transverse, longitudinal and
ring.
10. Annelidsdiffer from round:
1) bilateral symmetry; 2) through intestine; 3) the presence of a body cavity; 4) availability
circulatory system.
Part B
A) roundworm
B) bovine tapeworm
1) do not eat raw, poorly cooked or fried meat
2) wash your hands before and after eating
3) do not eat unwashed raw fruits and vegetables
4) protect food from flies
2 . Name the worm. Specify the type and class to which it belongs
Answers: Topic: “Worms: Flat, Round, Ringed”
Option 1
Option: 2
Option: 3
Option: 4
Last name, first name:
Last name, first name:
Last name, first name:
Last name, first name:
Last name, first name:
Last name, first name:
Bull tapeworm. The source of infection is cattle, as well as a sick person, who plays a major role in the spread of bovine tapeworm eggs. The participation of flies in the transmission of the pathogen is possible. A person becomes infected by eating raw, half-raw, lightly salted and dried meat, raw minced meat containing tapeworm larvae (Finns).
Liver fluke. The definitive hosts are herbivorous mammals (cattle and small cattle, horses, pigs, rabbits, etc.), as well as humans. The intermediate host is the small pond snail. Infection of the main host occurs when it eats grass from water meadows (for animals) or unwashed greenery (for humans).
Ascaris. A person becomes infected with roundworms by eating dirty vegetables, fruits, and herbs. Roundworm eggs are carried by wind and flies and settle on vegetables and fruits. Children often become infected with roundworms by eating soil or using toys contaminated with soil. Ascaris eggs mature only in the ground, so human infection with ascaris occurs only through things and products contaminated with soil containing ascaris eggs. Transmission of roundworms from person to person is impossible.
When eating contaminated foods, roundworm eggs enter the stomach and intestines, where they quickly turn into larvae.
7TH GRADE
TEST “TYPES: FLAT WORMS, ROUNDWORMS, RINGWORMS.”
For each task there are 4 possible answers. Choose one correct answer from the given ones:
1. What letter in the figure indicates an animal with radial symmetry of the body?
2. What type are animals with an elongated cylindrical body pointed at both ends, not divided into segments?
A) Roundworms
B) Annelids
B) Flatworms
D) Coelenterates
3. The circulatory system in invertebrate animals in the process of evolution first appeared in
4. Where does an adult bull tapeworm live:
A) in fresh water bodies
B) in the muscles of animals
B) in the human intestine
D) in the soil
5. Habitat of liver fluke larvae -
A) the body of cattle
B) water, small pond snail, aquatic plants
B) human intestines
D) human liver
6. The roundworm larva begins to develop in the egg after it enters
A) the body of a pond snail
B) muscles of a cow or sheep
B) an oxygen-rich environment
D) cattle liver
7. By nature of nutrition, white planaria is
8. Overall is
A) “heart” in annelids
B) the stomach of a roundworm
B) secondary body cavity
D) primary body cavity
9. The spaces between organs are filled with loose connective tissue
A) flatworms
B) roundworms
B) annelids
D) coelenterates
10. The complexity of roundworms compared to flatworms is evidenced by
Choose three correct answers from those given.
11. What signs have appeared in annelids compared to flatworms?
A) large clusters of nerve cells in the anterior part of the body
B) closed circulatory system
B) parenchyma between internal organs
D) skin-muscle bag
D) body cavity divided by partitions into segments
E) digestive, nervous, excretory systems of organs
Answer______________
A) organs of attachment
B) greater fertility
B) parenchyma
D) developed nervous system
D) flattened body shape
E) integuments that are not affected by digestive juice
Answer______________
Match the elements of the first and second columns. Write down the numbers corresponding to the selected answers in the table.
13. Establish a correspondence between the characteristic of worms and the type for which it is characteristic.
Sign
Type
A) the body is inarticulate, elongated, round in cross section
B) have a ventral nerve cord and a peripharyngeal nerve ring
B) the circulatory system is developed
D) the body cavity is lined with one layer of integumentary cells
D) muscles are formed by one layer of longitudinal fibers
Roundworms
Annelids
A
B
IN
G
D
Give answers to the questions in expanded form (in writing):
What harm do liver fluke and bovine tapeworm cause to human health?
Why are the white planaria and the bull tapeworm classified as the same type?
KEY TO QUESTIONS AND TASKS.
1.B
2.A
3.B
4.B
5 B
6.B
7.A
8.B
9.A
10.G
11.ABD
12.ABE
13.12221
14. They feed on semi-digested human food and secrete harmful metabolic products.
15. They have a flattened body, bilateral symmetry, their embryo consists of 3 layers of cells, the space between the organs is filled with parenchyma.
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7TH GRADE
Option 1
1. What type are animals with an elongated cylindrical body pointed at both ends, not divided into segments?
A) Roundworms
B) Annelids
B) Flatworms
D) Coelenterates
2. Where does an adult bull tapeworm live:
A) in fresh water bodies
B) in the muscles of animals
B) in the human intestine
D) in the soil
3. The roundworm larva begins to develop in the egg after it enters
A) the body of a pond snail
B) muscles of a cow or sheep
B) an oxygen-rich environment
D) cattle liver
4. Overall is
A) “heart” in annelids
B) the stomach of a roundworm
B) secondary body cavity
D) primary body cavity
6. What signs have appeared in annelids compared to flatworms?
A) large clusters of nerve cells in the anterior part of the body
B) closed circulatory system
B) parenchyma between internal organs
D) skin-muscle bag
D) body cavity divided by partitions into segments
E) digestive, nervous, excretory systems of organs
What harm do liver fluke and bovine tapeworm cause to human health?
7TH GRADE
TEST “TYPES: FLAT WORMS, ROUNDWORMS, RINGWORMS.”
Option 2
Choose one correct answer from those given.
2. Habitat of liver fluke larvae -
A) the body of cattle
B) water, small pond snail, aquatic plants
B) human intestines
D) human liver
4. The spaces between organs are filled with loose connective tissue
A) flatworms
B) roundworms
B) annelids
D) coelenterates
Choose three correct answers from those given.
Give the answer to the question in expanded form (in writing):
7. Why are the white planaria and the bull tapeworm classified as the same type?
KEY TO QUESTIONS AND TASKS.
Option 1
1-a
2-in
3-in
4-in
5-g
6-abd
7- They feed on semi-digested human food and secrete harmful metabolic products.
Option-2
1-b
2-b
3-a
4-a
5-in
6-abe
7- They have a flattened body, bilateral symmetry, the space between the organs is filled with parenchyma.
