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Ch15 Vertebrates
Endothermic Vertebrates
Question | Answer |
---|---|
Birds | endothermic animals with feathers & hollow bones |
clutch | a group of eggs |
contour feathers | strong, lightweight feathers that give the bird flight and shape |
down feathers | soft, fluffy, insulating layer of feathers |
preening | when a bird rubs oil over its feathers and cleans the feathers. |
mammals | endothermic animals with hair/fur and produce milk to feed & care for their young. |
mammary glands | produce milk for feeding the young |
monotremes | mammals that have fur but lay eggs with leathery shells |
marsupials | mammals that give birth to immature young that crawl into a pouch to finish developing |
placentals | mammals that give birth to live, completely developed young |
gestation period | the time it takes for the embryo to develop inside the uterus |
placentals | embryos that completely develop inside the female's uterus |
placenta | an organ that the embryo develops inside of |
umbilical cord | cord that transports food & oxygen from the placenta to the embryo |
embryo | developing baby inside the female. |