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25 Cards in this Set
- Front
- Back
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What is a bird?
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A endothermic vertebrea that has featersand a four-chambered heart. It also lays eggs.
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Why are the bones hollow?
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to make them light wieght.
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Whats a contour feather?
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a feather that gives the bird shape.
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What are down feathers?
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a feather that keeps the bird warm.
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What are air sacks?
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They hold oxygen.
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What does the crop do?
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It stores food before entering the stomach.
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What does the gizzard do?
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It squeezes and grinds the food.
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How much does a bird eat a day?
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a quarter of its wieght.
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What keeps birds warm in the cold?
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down feathers.
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Do birds lay eggs?
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yes
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What is the upward force called when a bird fly's?
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lift.
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What are the three types of flying?
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flapping, soaring, and diving.
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what is flapping?
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its when the birds flap their wings.
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What is soaring?
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Its when the bierd glides with their wings extended.
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What is diving?
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it is when birds comedown from the sky using no energy.
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What do all mammals share?
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4 chambered heart, fur or hair, mom produces milk, and endothermic vertebrates.
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What are mammary glands?
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glands that produce milk.
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How do mammals chew their food?
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With their teeth. Thats how they obtain food.
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Whats the diaghragm?
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a large muscel under the lungs that helps the mammal breath.
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What keeps mammals warm?
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their fur.
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What do mammals move with?
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their limbs
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What are monotremes?
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Egg-laying mammals.
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What are marsupials?
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A mammal with a pouch.
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Whats a gestation period?
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The time between birth and fertilization.
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Whats a placental mammal?
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a mammal that develops in its mothers body.
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