Biology - Chapter 19

1. white portion of an egg
5. liquid excreted from the body and contains metabolic wastes that have been filtered from the blood
6. thin-walled portion of the digestive tract in some animals that temporarily stores food prior to digestion
7. method of reproduction in which young are born alive after developing inside the female reproductive system
10. effect that one animal has on organisms throughout an ecosystem
13. layer of insulating fat beneath the skin of marine animals
14. proteinaceous structure that covers a bird and enables flight
16. organ located between the pharynx and esophagus that is involved in sound production and regulation of breathing
18. first chamber in a ruminant stomach
19. flexible structure containing blood vessels that conducts the blood of the fetus to the placenta
20. hoofed mammal
23. movement of an organism from one location to another, often seasonally and over long distances
25. mammals who completes embryonic development in the mother's pouch
26. thick-walled digestive organ that grinds food
27. period of time between conception and birth

2. able to internally regulate body temperature
3. type of tail that can be flexed and used for gripping or holding things
4. mammals famous for their ability to reproduce quickly
8. large ridge on a bird's sternum to which the flight muscles attach
9. organ of female mammals that produces milk to nourish the young
11. animal behavior that promotes mate selection and breeding
12. structure that allows nutrient and waste exchange between mother and embryo
15. avian voice box
17. series of hollow chambers that form a part of the respiratory system in birds
19. reproductive organ for storing ova until they are fertilized or laid / in mammals, the organ in which an embryo develops
21. mammal able to survive a wide range of habitats or adapt to changes in a habitat
22. muscle beneath the lungs that controls breathing by expanding and contracting
24. to keep an egg at a suitable temperature for development and hatching