Fish 3 classes –Agnatha: jawless fishes Lamprey, Hagfish –Chondricthyes: Cartilaginous fishes...
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Transcript of Fish 3 classes –Agnatha: jawless fishes Lamprey, Hagfish –Chondricthyes: Cartilaginous fishes...
![Page 1: Fish 3 classes –Agnatha: jawless fishes Lamprey, Hagfish –Chondricthyes: Cartilaginous fishes Sharks, skates, rays –Ostichthyes: Bony fishes All other.](https://reader036.fdocuments.in/reader036/viewer/2022062307/5514ef3055034693478b5dd3/html5/thumbnails/1.jpg)
![Page 2: Fish 3 classes –Agnatha: jawless fishes Lamprey, Hagfish –Chondricthyes: Cartilaginous fishes Sharks, skates, rays –Ostichthyes: Bony fishes All other.](https://reader036.fdocuments.in/reader036/viewer/2022062307/5514ef3055034693478b5dd3/html5/thumbnails/2.jpg)
FishFish• 3 classes
– Agnatha: jawless fishes• Lamprey, Hagfish
– Chondricthyes: Cartilaginous fishes• Sharks, skates, rays
– Ostichthyes: Bony fishes• All other fishes
• Breathing: gills or gill slits• 2 chambered heart• Sexual Reproduction
– Most external fertilization
• Scales
![Page 3: Fish 3 classes –Agnatha: jawless fishes Lamprey, Hagfish –Chondricthyes: Cartilaginous fishes Sharks, skates, rays –Ostichthyes: Bony fishes All other.](https://reader036.fdocuments.in/reader036/viewer/2022062307/5514ef3055034693478b5dd3/html5/thumbnails/3.jpg)
AmphibiansAmphibians
• Smooth moist skin• Mucous glands
– sometimes associated with poison glands
• Metamorphosis• Ectothermic• Sexual reproduction• Variety of
respiratory modes– Lungs, gills, skin
![Page 4: Fish 3 classes –Agnatha: jawless fishes Lamprey, Hagfish –Chondricthyes: Cartilaginous fishes Sharks, skates, rays –Ostichthyes: Bony fishes All other.](https://reader036.fdocuments.in/reader036/viewer/2022062307/5514ef3055034693478b5dd3/html5/thumbnails/4.jpg)
ReptilesReptiles• Adaptations for life on dry
land• Scales• Legs positioned right
underneath body– Can support body weight better
• 3 chambered heart– Crocs have 4 chambers
• Ectotherms• Sexual reproduction
– Internal fertilization– Amniotic egg
![Page 5: Fish 3 classes –Agnatha: jawless fishes Lamprey, Hagfish –Chondricthyes: Cartilaginous fishes Sharks, skates, rays –Ostichthyes: Bony fishes All other.](https://reader036.fdocuments.in/reader036/viewer/2022062307/5514ef3055034693478b5dd3/html5/thumbnails/5.jpg)
BirdsBirds• Adaptations for flight:
– Feathers– Wings– Hollow bones
• Endothermic• 4 chambered heart• Sexual reproduction
– internal fertilization– Amniotic egg with
hard shell
![Page 6: Fish 3 classes –Agnatha: jawless fishes Lamprey, Hagfish –Chondricthyes: Cartilaginous fishes Sharks, skates, rays –Ostichthyes: Bony fishes All other.](https://reader036.fdocuments.in/reader036/viewer/2022062307/5514ef3055034693478b5dd3/html5/thumbnails/6.jpg)
MammalsMammals• Hair• Endothermic• Provide milk for their
young• 4 chambered heart• Different types of
teeth• Modified limbs
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MammalsMammals• Placental Mammals
– Offspring are carried inside the mother until development is almost complete
– Nourishment and oxygen provided via placenta
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MammalsMammals• Marsupials–Short period of development
inside mom–Second period of development
in a pouch made of hair and skin
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MammalsMammals
• Montremes– Egg laying mammals– Have hair and
mammary glands– Only found in
Austrailia, New Guinea, and Tazmania
– Echidnas and Platypuses