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Vertebrates - 2
Birds and Mammals
| Question | Answer |
|---|---|
| preening | in birds, the act of grooming and maintaining their feathers |
| molting | the shedding of an exoskeleton, skin, feathers, or hair to be replaced by new parts |
| down feathers | a soft feather that covers the body of young birds and provides insulation to adult birds |
| contour feathers | one of the most external feathers that cover a bird and that helps determine its shape |
| lift | an upward force on an object that moves in a fluid |
| brooding | to sit on and cover eggs to keep them warm until they hatch to incubate |
| mammary gland | in a female mammal, a gland that secretes milk |
| diaphragm | a dome-shaped muscle that is attached to the lower ribs and functions as the main muscle in respiration |
| placental mammal | a mammal that nourishes its unborn offspring through placenta inside its uterus |
| gestation period | in mammals, the length of time between fertilization and birth |
| monotreme | a mammal that lays eggs |
| marsupial | a mammal that carries and nourishes its young in a pouch |
Created by:
lsvocab
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