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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. |