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BJU Life Science 14
Bob Jones Life Science - Chapter 14
| Question | Answer |
|---|---|
| down feather | A short, fluffy feather next to a birds skin that insulates the bird by holding warm air close to its body. |
| contour feather | A long feather that covers and helps insulate a bird, gives it a streamlines shape, repels water, and aids in flight. |
| air sac | One of a series of hollow chambers connected to a bird's respiritory system that allows for a fresh supply of oxygen during both inhalation and exhalation. |
| mammary gland | An organ in mammals that produces milk to nourish young. |
| placental mammal | An endothermic vertebrate that as an embryo receives food and oxygen and has wastes removed through the placenta of the mother. |
| placenta | A structure attached to the wall of the uterus in which the mother's and the embryo's blood vessels pass near each other and exchange nutrients and waste. |
| umbilical cord | A structure that connects a developing embryo to the placenta and that has blood vessels for the exchange of food, wastes, oxygen, and carbon dioxide with the mother. |
| monotreme | A mammal that reproduces by laying eggs. |
| marsupial | A mammal whose young develop in a pouch. |
Created by:
marchscience
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