matter and al ared e m gray matter is composed of cell bodies and e brain otunmyelinated nerve fibers, and the white matter s composed of myelinated fibers. Myelinated nerves generally carry impulses more quickly than unmyelinated nerves mooth e con The quilib- IS VIS- Questions ation. t an heart d the ssels, talso neez- 1. Why do you think it is good to have a brain with many gyri and sulci? 2. What could happen if someone suffered an accident in which part of the cerebellum were injured? I see (Fi ll be sists and 3. Compare the pig brain to drawings of a human brain, a fish brain, and a bird brain. Can you see how the pig’s anatomy paral- lels human anatomy? What can you con- clude about our relation to animals like pigs? Like birds? Like fish? cov- that the on- 4. Consider this situation: A blood clot has broken free and is passing through a carotid artery. Why could this be danger- ous? om s of 5. Consider this situation: A blood clot has broken free and is passing through the jugular vein. Where could this clot end up will ray and be dangerous? 45
