Animal Chordates

3. a large muscular heart chamber that receives blood that is about to enter the ventricle.
10. the lobes of the brain that receive signals from the receptors in the nose
11. the lobes of the brain that integrate sensory information and coordinate the creatures response
13. a state of extremely low metabolism and respiration, accompanied by lower-than-normal body temperatures
16. the lobes that coordinate vital functions, such as those of the circulatory and respiratory systems, and transport signals from the brain to the spinal cord
17. blood vessels that carry blood back to the heart
18. development: development that occurs inside the female,, allowing the offspring to gain nutrients and vital substances from the from the mother through a placenta
20. blood vessels that carry blood away from the heart
21. segments of bone or some other hard substance that are arranged into a backbone

1. the process by which the female lays eggs and the male fertilizes them once they are outside
2. development that occurs in an egg that is hatched inside the female’s body
4. the process by which the male places sperm inside the female’s body where the eggs are fertilized
5. the lobe that controls involuntary actions and refines muscle movement
6. a shelled, water-retaining egg that allow reptile, bird, and certain mammal embryos to develop on land
7. development that occurs in an egg that is hatched outside the female’s body
8. a skeleton on the inside of a creature’s body
9. the lobes of the brain that receive signals from the receptors in the eye
12. tiny, thin-walled blood vessels that allow the exchange of gasses and nutrients
14. a rod of tough, flexible material that runs the length of a creature's body, providing the majority of its support
15. a life cycle in which creature are hatched in freshwater, migrate to salt water as adults, and then go back to freshwater in order to reproduce
19. a thick-walled muscular heart chamber from which blood is pumped out to the body