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Chapter 17 Birds and Mammals

Chapter 17 Birds and Mammals. A fluffy insulating feather that lies next to a bird’s body. Click for Term. Down Feather. A fluffy insulating feather that lies next to a bird’s body. Click for Term. A feather made of a stiff central shaft with many side branches’ called barbs. Click for Term.

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Chapter 17 Birds and Mammals

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  1. Chapter 17Birds and Mammals

  2. A fluffy insulating feather that lies next to a bird’s body Click for Term

  3. Down Feather A fluffy insulating feather that lies next to a bird’s body Click for Term

  4. A feather made of a stiff central shaft with many side branches’ called barbs Click for Term

  5. Contour feather A feather made of a stiff central shaft with many side branches’ called barbs Click for Term

  6. Activity in which a bird uses its beak to spread oil on its feathers Click for Term

  7. Preening Activity in which a bird uses its beak to spread oil on its feathers Click for Term

  8. An upward force on an object (such as a wing) caused by differences in pressure above and below the object; opposes the downward pull of gravity Click for Term

  9. Lift An upward force on an object (such as a wing) caused by differences in pressure above and below the object; opposes the downward pull of gravity Click for Term

  10. When a bird sits on its eggs until they hatch Click for Term

  11. Brooding When a bird sits on its eggs until they hatch Click for Term

  12. Glands that secrete a nutritious fluid called milk Click for Term

  13. Mammary glands Glands that secrete a nutritious fluid called milk Click for Term

  14. The sheet of muscle underneath the lungs of mammals that helps draw air into the lungs Click for Term

  15. Diaphragm The sheet of muscle underneath the lungs of mammals that helps draw air into the lungs Click for Term

  16. A mammal that lays eggs Click for Term

  17. Monotremes A mammal that lays eggs Click for Term

  18. A mammal that gives birth to live, partially developed young that continue to develop inside the mother’s pouch or skin fold Click for Term

  19. Marsupial A mammal that gives birth to live, partially developed young that continue to develop inside the mother’s pouch or skin fold Click for Term

  20. A mammal that nourishes unborn offspring with a placenta inside the uterus Click for Term

  21. Placental mammals A mammal that nourishes unborn offspring with a placenta inside the uterus Click for Term

  22. The time during which an embryo develops within the mother Click for Term

  23. Gestation period The time during which an embryo develops within the mother Click for Term

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