Orders of bony fish presentation. Presentation for biology lesson "class of bony fish"
"Bone-cartilaginous fish" - Bony fish. Perciformes. Herring-shaped. Sturgeon. in biology on the topic of “fish” by Dmitry Kropotov, a 7th grade student. Batoidea) contain five orders and fifteen families. Carp-like. Stingrays (lat. Chimera-like. Salmon-like. The tail is whip-shaped. Herring-like (lat. Clupeiformes) - an order of bony fish.
“The Variety of Fishes” - Fish is a clown. Som Soldatova. Predators. Torso. Fish is the moon. Herbivores. Crucian carp. Omnivores. Growing. Mammals. Zebra is a lionfish. Fins. Cockerel. Som. Gill cover. Teacher: Buivol Olga Anatolyevna Municipal Educational Institution “Primary Secondary School No. 14”, Birobidzhan. Tail fin. They breed offspring.
"Electric Ray" - The fish takes some time to recharge. Even mental illnesses were treated with stingrays. (Similarly, in the 11th century, the Arabs used stingrays to treat rheumatism - the forerunner of modern electroshock therapy.) Electric stingrays have always excited people's consciousness. Can an electric stingray kill a person?
“Fish Lesson” - Teacher Eremenko E. Yu. Unpaired limbs are formed by the caudal and anal fins. The skeleton does not perform a function: Fish perceive the direction of flow and the force of water pressure with the lateral line. The respiratory organ is the gills; the fish's mouth is equipped with movable jaws. Find what is superfluous, explain the choice. There are paired limbs represented by __ and __ fins.
“Subclasses of fish” - Class Cartilaginous fish. Classification of fish. Superclass of fish. Phylum Chordata. Squad Stingray. Shark Squad. Presence of a skull and hard skeleton. Subclass ray-finned. Exclusively aquatic animals living in fresh and salt waters. Subclass Whole-headed. One of the most ancient vertebrates. Phylum: Chordata Class: Fish.
“Aquarium fish” - How does a person use fish? MOU DPO "Oktyabrsky CIT". What fish have antennae? The world around us 1st grade “School 2100” Teacher: Khismatullin Ruslan Faritovich. BMMC No. 59316. Variety of aquarium fish. S o m. 2. 3. Which fish live long? Final work on the advanced training program “Basic ICT competence”.
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Slide captions:
7th grade. Animals. Lesson No. 2 in the section: “Type Chordates.” Completed by: Poltavtseva O.A. biology teacher at Proletarskaya Secondary School No. 4 named after. Nisanova Kh.D. LESSON TOPIC: “Fish class: Cartilaginous, Bony.” OBJECTIVE OF THE LESSON: To get acquainted with the variety of fish; Give a general description of the classes of cartilaginous and bony fish; To study the features of the external and internal structure of fish in connection with their combined habitat. Make sure that the fish belong to the phylum Chordata.
LESSON PLAN. 1. Updating knowledge: test on the material covered with frontal verification. 2. Study of new material: Determine the place of the fish class in the natural classification of the animal world. Study the general characteristics of the class Cartilaginous fish. Study the general characteristics of the class Bony fish. Consider the external and internal structure of fish. Get acquainted with the diversity of representatives of these classes. 10. Consolidation of knowledge: tests. 11. Summing up. Homework.
Checking homework. 1. Chordates include: a) warm-blooded animals; b) skullless /lancelets/; c) multicellular animals; d) animals with a nervous system. 2.Vertebrates descended from: a) mollusks; b) arthropods; c) modern lancelets; d) skullless. 3. Vertebrates are not characterized by the presence of: a) a brain; b) chords; c) spine; d) hearts. 4.Skullless animals are characterized by: a) the absence of an internal skeleton; b) replacement of the chord with the spine; c) the movement of blood through the vessels due to the contraction of the heart; d) the presence of a notochord throughout life.
The structure of bony fish. External structure of a fish Internal structure of a fish
SYSTEMATICS. Kingdom – Animalia Phylum – Chordata Subphylum – Cranial/vertebrate/ Classes Cartilaginous fish Bony fish Orders Sharks Sturgeon Rays Herring Chimaera Salmoniforms Cyprinidae Perciformes
General characteristics of the class Cartilaginous fish. 1. Inhabitants of the marine environment. 2.Cartilaginous skeleton. 3.Gill slits without gill covers. 4.Transverse oral opening on the underside of the head. 5. There is no swim bladder.
SHARKS RAYS Representatives of the class Cartilaginous fish.
General characteristics of the class Bony fish. They live in seas, oceans, rivers and lakes, in permanent and temporary reservoirs. The body shape is varied: elongated, circular, torpedo-shaped, flattened, leaf-shaped, snake-shaped. The head, pointed at the front, is fused with the body, which starts from the free edge of the gill covers and ends with the anal fin. Next comes the tail section. The skin is covered with scales. The scales overlap each other, arranged in rows. The skin contains various glands (mucus-secreting, poison-secreting, luminous). The skeleton consists of the bones of the head (skull), spine, paired skeleton (pectoral and abdominal) and unpaired (caudal, dorsal, anal) fins. There is a swim bladder that is filled with a mixture of gases. Respiratory organs are gills that are covered with gill covers. The circulatory system is closed. The heart is two-chambered, one circle of blood circulation. Excretory organs are ribbon-shaped buds. The reproductive organs of females are the ovaries, and the reproductive organs of males are the testes. The nervous system has a brain. Sense organs: organs of vision, hearing, smell, touch, taste.
Representatives of the class Bony fish.
Living “fossil” lobe-finned fish Coelacanth. About 400 million years ago, lobe-finned fish appeared in the seas and fresh water bodies of our planet. It was believed that these fish became extinct about 7 million years ago. But by 1980, more than 70 coelacanths had been caught. These fish have a primitive organization. The vertebral bodies and the elastic chord are not ossified. There is a “double heart” that pumps both arterial and venous blood. They reproduce by viviparity. They have skeletal formations in paired limbs, equipped with powerful muscles. It has no practical commercial significance.
Consolidation of new material. Choose the correct statements. 1) In cartilaginous fish, the gills are closed with cartilaginous covers. 2) The largest shark is the whale shark. 3) Most stingrays lead a bottom-dwelling lifestyle. 4) Sharks and rays lead a bottom-dwelling lifestyle. 5) All sharks are dangerous to people. 6) Cartilaginous fish have highly developed muscles. 7) Cartilaginous fish have a swim bladder. 8) The skin of cartilaginous fish is covered with scales. 9) The body of stingrays has a torpedo-shaped body. 10) The coloring of stingrays is protective.
Select one answer out of four: 1. The following does not belong to the class of bony fish: a) carp; b) slope; c) perch; d) coelacanth. 2. Bony fish, unlike cartilaginous fish, have: a) pectoral and ventral fins; b) streamlined body shape; c) gills covered with gill covers; d) developed caudal fin. 3. Number of chambers in the heart of fish: a) two; b) three; c) one; d) four. 4. The adaptation of fish to the aquatic environment is not: a) the presence of paired fins; b) lateral line; c) brain and spinal cord; d) breathing using gills. 5. The circulatory system of fish: a) has one circle of blood circulation; b) has two circles of blood circulation; c) has a three-chambered heart; d) open. 6. With the help of the swim bladder, fish: a) digest food; b) moves faster; c) perceives the direction and strength of water flow; d) sinks to depth or floats up. 7. Cartilaginous fish do not include: a) white shark; b) European chimera; c) common catfish; d) two-winged stingray. 8.Pulmonary respiration is characteristic of fish: a) chimaeras; b) lobe-finned; c) salmonids; d) sharks. 9. Coelacanth - a representative of fish: a) perciformes; b) lobe-finned; c) carp-like; d) herring. 10. The gills are closed by gill covers in: a) sharks; b) stingray; c) perch; d) chimeras.
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Slide captions:
Internal structure, reproduction and development of fish Sports, be mistaken, make mistakes, but, for God’s sake, think, and although crookedly, yes yourself. Gotthald Lessing
Bone skeleton of a fish The basis of the bone skeleton is the spine and skull
Internal structure The body cavity of fish contains the digestive organs: the esophagus, stomach, intestines and liver, as well as the swim bladder, heart, paired kidneys and gonads.
Digestive system Fish jaws have small or large teeth
Respiratory system Fish respiratory organs - gills
Circulatory system, heart, blood vessels. Fish have only one circle of blood circulation. The system is closed.
Structure of the heart The heart of fish consists of one atrium and one ventricle. There is always venous blood in the heart. atrium vein artery ventricle
Blood vessels Arteries Veins atrium vein artery ventricle these are the vessels through which blood leaves the heart these are the vessels through which blood returns to the heart
PHYSICAL MINUTE
Nervous system The nervous system consists of: the brain and spinal cord and radiating nerves
Brain diencephalon cerebellum medulla oblongata forebrain midbrain
Reproduction of fish Fish are dioecious. Females lay eggs, males lay milk containing sperm. Fertilization in most bony fishes is external.
Fish larvae
Fish development
Test answers: 1 – B 2 – C 3 – A 4 – A 5 – C
Evaluation criteria: All answers are correct – “5” 4 correct answers – “4” 3 correct answers – “3” 2 correct answers – “2”
Homework § 32.33 Sports, be mistaken, make mistakes, but, for God’s sake, think, and even if it’s crooked, do it yourself. Gotthald Lessing
Preview:
Test
Internal structure of fish
- The skeleton of a fish consists of:
A – skull and spine
2. Heart of fish:
A – single-chamber
B – three-chamber
B - two-chamber
A – external fertilization
5. Circulatory system of fish:
A – closed, no heart
B – closed, has a heart
Test
Internal structure of fish
- The skeleton of a fish consists of:
A – skull and spine
B – skull, spine and skeleton of fins
B – spine and skeleton of fins
2. Heart of fish:
A – single-chamber
B – three-chamber
B - two-chamber
3. The nervous system of fish consists of:
A – brain and spinal cord, nerves
B – brain and nerves
B – brain and spinal cord
4. Most fish are characterized by:
A – external fertilization
B – internal fertilization
5. Circulatory system of fish:
A – closed, no heart
B – open, has a heart
B – closed, has a heart
Preview:
Lesson on:
"Internal structure, reproduction and development of fish."
Biology teacher of the highest category, MBOU OOSH “School No. 226”
Shilova Tatyana Viktorovna.
The purpose of the lesson: form an idea of the internal structure of fish.
Lesson objectives:
Educational : consolidate knowledge about the general features of chordates, continue to form an idea of vertebrate animals using the example of river perch, its internal structure, and form an idea of vertebrate organ systems.
Developmental : develop logical thinking, the ability to compare, highlight the main thing.
Educational: cultivate a love of nature and a culture of communication.
Equipment: computer presentation, computer, multimedia complex.
During the classes.
1 Studying new material.
Slide 1
Hello guys, my name is Tatyana Viktorovna. Today, while working in class, we will discover another secret of biological science. But first I would like to draw your attention to the wordsGotthold Lessing (read out). I would like these words to be the guiding thread of our lesson.
Remember what animals you met in the last lesson?(fish)
What place do they occupy in the animal world?(what type and class do they belong to) well done, thank you!
? What features of the external structure of fish did you learn in the last lesson?(streamlined body shape, presence of fins, skin covered with scales and mucus, etc.)
On click
Today in the lesson we will conduct research, during which we will try to find out: “The internal structure, reproduction and development of fish.” This is the topic of our lesson, please write it down.
Slide 2
Let's start getting acquainted with the internal structure of fish - with the skeleton.
? Why do you think a skeleton is needed?(support, protection).
On the slide you see the bony skeleton of a fish.What main parts does it consist of?I suggest you discuss this question in pairs, 1 minute per discussion. We listen to your answers......
Now let's see if this is true.
On click
Yes, you were right, the skeleton of a fish consists of a skull, a spine and a skeleton of fins (write it down in your notebook).
The skull includes: skull, upper and lower jaws, eye socket bones, gill covers.
What does the spine of a fish consist of?Well done, these are vertebrae.
Are they all the same in the fish skeleton?(No)
As we can see, the spine of a fish consists of different vertebrae, which form two sections: the body and the tail. The trunk vertebrae are special, they consist of a body and three spinous processes - one process is directed upward, and two look downward, with ribs adjacent to them.
What do you guys think, why are ribs needed?(that's right, to protect internal organs)
Slide 3
The body cavity of a fish contains organs and organ systems.
What organ systems do you already know?(called) Well done.
Slide 4
We continue our research. This is the digestive system.
What organs make up the digestive system?(answers) Okay, well done, let's see if we named the organs of the digestive system correctly.
Click
What feature do you think there is in the digestive system of fish that distinguishes it from other previously studied animals?I suggest discussing this with your deskmate or finding the answer in the textbook (p. 156) (answer: teeth) click Write this down in your notebook.
Slide 5
The next system we'll look at is respiratory
What is the main habitat of fish?(water) correct.
Click . All aquatic animals have a special respiratory organ - gills.
Fish constantly swallow water. From the oral cavity, water passes through the gill slits, washes the gills and comes out from under the gill covers.
On click
Gills consist of: gill arch, stamens and petals
Stamens – protect the delicate gills from clogging with food particles.
The petals are penetrated by the smallest blood vessels - capillaries. Gas exchange occurs through the walls of the capillaries: the blood is saturated with oxygen, and carbon dioxide is released into the water.
Slide 6
The next object of our research iscirculatory system.
What feature in the structure of the circulatory system can you note?I suggest discussing this with your neighbor (closed, has a heart, one circle of blood circulation).
Slide 7
The heart of fish is two-chambered - consists of an atrium and a ventricle.The heart contracts very weakly and rarely - only 20 beats per minute.
Slide 8
The large blood vessels of fish are arteries and veins.
How would you define a blood vessel - an artery?Look at the picture, maybe it will help you, or discuss the answer in pairs.
And so: an artery is...
Vienna is... (write it down in your notebook) click definition on the slide.
Slide 9 – charging
Slide 10
The coordinated functioning of organs and organ systems is ensured by the nervous system.
What features in the structure of the nervous system can you name?(consists of the g/m and s/m and the nerves extending from them; located on the dorsal side).
Slide 11
The fish brain has five sections: medulla oblongata, anterior, intermediate, middle and cerebellum. Thanks to this structure of the brain, fish can form simple conditioned reflexes.
Are there any fishermen among you? Explain why the fish are fed for several days before fishing?(correctly or I explain myself)
You can observe the formation of a simple conditioned reflex in aquarium fish (story)
Slide 12
Fish are dioecious animals.
The reproductive organs of females are the ovaries, in which the eggs - eggs - mature.
The reproductive organs of males are the testes (milt), in which sperm mature.
Fertilization in fish is external, since the fusion of sperm and egg occurs outside the female’s body.
Slide 13
From the fertilized eggs, larvae first appear, which live and develop due to the yolk sac.
Slide 14
Then the larvae become covered with scales, their mouths erupt, and they become fry. The fry grow, feed and turn into adult fish.
Our study is over, I suggest you take a test and check what you remember when studying new material.
Slide 15 - answers
Slide 16 – evaluation criteria
Peer review, grading. Who passed the test on 5, 4. Are there those who failed the test?
Slide 17
D/z § 32.33. click
In conclusion, I want to return to the words that became the motto of our lesson
Today we learned how fish work. We were wrong, we tried to reason, “although it’s crooked, but on our own.” I would like you to follow this motto not only in class, but also in life.
Thank you guys, it was a pleasure working with you.