Fish
An organ used to breathe underwater.
Gills
A cold - blooded vertebrate that lives partly in water and partly on land.
Amphibian
An animal whose temperature varies with its surroundings; ectothermic animals are also called cold-blooded.
Ectotherm
A set of eggs.
Clutch
An animal with a constant temperature; endothermic animals are also called warm-blooded.
Endotherm
A gas-filled bag that helps fish to float in water.
Swim Bladder
The immature form of a frog or toad
Tadpole
A cold-blooded vertebrate with scaly skin.
Reptile
A pouch in a bird's digestive system where swallowed food is stored.
Crop
A warm-blooded animal with hair that feeds its young on milk
Mammal
An animal with a backbone.
Vertebrate
How are amphibians similar to reptiles?
They are both cold - blooded, lay eggs, three - chambered heart.
Small, overlapping plates that protect the skin.
Scales
A chamber in an animal's stomach that grinds up food.
Gizzard.
The milk-producing organ of a female mammal.
Mammary Gland
How many chambers does a fish heart have?
Two
What is metamorphosis?
The radical, physical change from the offspring into the adult. The offspring looks nothing like the adult.
What are some differences between amphibians and reptiles?
A young bird at the time it leaves the nest.
Fledgling
A mammal that lays eggs, such as a duck-billed platypus.
Monotreme
What are some characteristics of fish?
Two-chambered heart, scales, mucus, fins
What are some characteristics of amphibians?
Smooth, slimy skin; cold - blooded, three - chambered heart, etc.
What are some characteristics of reptiles?
Scales, dry skin, breathe through lungs, cold-blooded.
What are some unique traits of birds?
They have feathers, hollow bones, beaks
What are unique characteristics of a mammal?
Four-chambered heart, hair or fur, complex brain, warm-blooded.