The basic structural unit of the nervous system is the
a. axon.
b. neuron.
c. red blood cell.
d. white blood cell.

What evidence can you use to prove that different nerves carry information from the fingertips to the brain?

Diagram the passage of food through the digestive system. label the organs involved in digestion and absorption and identify the sites where carbohydrates, proteins, and fats are digested.

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