Across
- 3. enables the exchange of oxygen between the mother and the developing young
- 4. type of egg in which the embryo can develop out of water
- 6. part of the central nervous system
- 7. part of the peripheral nervous system
- 11. has high metabolic rates and loses heat while resting
- 14. produces physical force by contracting
- 16. internal and grows with the animal
- 19. a mammal that produces amniotic eggs
- 20. type of skeleton found in spiders
- 21. when embryos obtain nutrients from the mothers body during development
- 24. type of skeleton possessed by earthworms
- 25. a type of nerve that receives the initial stimuli
- 27. responsible for coordinated movement and balance
- 28. the middle man of the nervous system
Down
- 1. a group of interneurons
- 2. responsible for conscious thought
- 5. the infant develops inside of the mothers pouch
- 8. rigid internal structure used for support
- 9. shedding of the exoskeleton by invertebrates
- 10. when embryos develop in eggs outside of the body
- 12. chemical produced by the endocrine gland and is distributed by the circulatory system
- 13. all body systems must interact to maintain this
- 15. loses and gains heat from its environment
- 17. a mammal that lays eggs outside of the body
- 18. used by endotherms to regulate body heat
- 22. type of metamorphosis and contains a nymph stage
- 23. type of system that helps fight pathogens in the body
- 26. produced by humans to reduce body heat