Module 13: Phylum Chordata

4. The lobe that controls involuntary actions and refines muscle movement.
7. Cells that continue to produce new bone tissue as the bones grow and reshape as the vertebrates grow.
8. Lacking an internal mechanism for regulating body heat
9. Are mature bone cells that are surrounded by the bone matrix.
11. A skeleton on the inside of the body, composed of bone and cartilage.
12. Cells that promote the formation of bone tissue by producing the bone matrix.
13. The portion of the skeleton that attaches to the axial skeleton and has the imbs attached to it.
16. A circulatory system in which the oxygen-carrying blood cells never leave the blood vessels.
17. The lobes of the brain that receive signals from the receptors in the nose.
18. The lobes of the brain that receive signals from the receptors in the eyes
20. Blood vessels that carry blood away from the heart.
21. The portion of the skeleton that supports and protects the head, neck, and trunk

1. The lobes of the brain that integrate sensory information and coordinate the creature's response to that information.
2. Tiny, thin-walled blood vessels that allow the exchange of gases and nutrients between the blood and the cells of the body.
3. What subphylum includes vertebrates that have a notochord during early development and then turns into a true backbone before the animals are born or hatched.
5. Blood vessels that carry blood back to the heart.
6. What subphylum includes the organisms that have notochords throughout life.
10. Segments of bone or some other hard substance that are arranged to provide support.
14. A rod of tough, flexible material that runs the length of a creatures' body, providing support.
15. What subphylum contains creatures that have a notochord through the larva stage and it actually disappears in the adult stage of life.
19. What controls the nervous system.