Question

question 21
the inner protective covering of the brain is called the
cranium.
meninges.
cerebrospinal fluid.
compact bone.

question 22
how many pairs of spinal nerves are connected to the spinal cord?
23
13
31
32

Explanation:

• Question 21: The meninges are the inner protective coverings of the brain. The cranium is the skull bone (outer - most in a sense for the brain protection), cerebrospinal fluid is a fluid that cushions the brain and spinal cord but is not a 'covering' in the same tissue - like sense as meninges, and compact bone is a type of bone tissue (not related to the inner brain covering).
• Question 22: There are 31 pairs of spinal nerves connected to the spinal cord. There are 8 cervical, 12 thoracic, 5 lumbar, 5 sacral, and 1 coccygeal pair of spinal nerves.

Answer:

• Question 21: meninges
• Question 22: 31