Question

worksheet 1
what protects the brain?
what are the two hemispheres of the brain?
what connects the 2 hemispheres? what is it made of?
what are the 4 lobes of the brain?
what are the three evolutionary levels of the brain?

Explanation:

1. The skull and meninges protect the brain. The skull is a bony structure, and the meninges are three - layer membranes.
2. The two hemispheres of the brain are the left and right cerebral hemispheres.
3. The corpus callosum connects the two hemispheres. It is made of white matter, which consists of myelinated nerve fibers.
4. The four lobes of the brain are the frontal, parietal, temporal, and occipital lobes.
5. The three evolutionary levels of the brain are the reptilian brain (brainstem and cerebellum), the limbic system, and the neocortex.

Answer:

1. The skull and meninges.
2. The left and right cerebral hemispheres.
3. The corpus callosum; white matter (myelinated nerve fibers).
4. Frontal, parietal, temporal, occipital lobes.
5. Reptilian brain (brainstem and cerebellum), limbic system, neocortex.