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Vertebrates, Fishes, Amphibians and Reptiles

Science

Vertebrates, Fishes, Amphibians and Reptiles Chapter Video

Vertebrates, Fishes, Amphibians and Reptiles Chapter Video

amniotic egg

an egg with a shell and membrane to protect the embryo, like an egg laid by birds, reptiles, and mammals
amniotic egg Simple Definition

amphibian

a cold-blooded animal that can live both on land and in water, like a frog
amphibian Simple Definition

cartilage

a strong, flexible connective tissue found in skeletons
cartilage Simple Definition

chordate

an animal that has a tail, nerve cord, notochord, and throat slits at some point in its life
chordate Simple Definition

ectotherm

an animal whose body temperature depends on its environment
ectotherm Simple Definition

endotherm

an animal that can generate heat to maintain a constant internal temperature
endotherm Simple Definition

gill

the breathing organ of aquatic animals
gill Simple Definition

lung

the respiratory organ that absorbs oxygen from the air and removes carbon dioxide from the blood
lung Simple Definition

mammal

a warm-blooded vertebrate whose young feed on milk produced by the mother
mammal Simple Definition

notochord

a flexible, rod-like structure that runs along the upper part of a chordate’s body
notochord Simple Definition

reptile

a cold-blooded vertebrate with scaly skin that lays eggs
reptile Simple Definition

scale

A ratio of the size of a model to the object it represents.
scale Simple Definition

swim bladder

a gas-filled sac in bony fishes that helps them to control their swim depth
swim bladder Simple Definition

tadpole

the aquatic larva of a frog or toad
tadpole Simple Definition

ventricle

one of the heart’s two lower chambers, it pumps blood out of the heart
ventricle Simple Definition

vertebrate

an animal with a backbone
vertebrate Simple Definition

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