In the Diagram,which Bone Is Considered the Keystone of the Cranial

question 10

Multiple Choice

In the diagram,which bone is considered the keystone of the cranial floor?

• A)E
• B)B
• C)G
• D)H

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Definitions:

Tunica Media

The middle layer of the wall of a blood vessel, composed primarily of smooth muscle and elastic tissue.

Smooth Muscle

Involuntary, non-striated muscle found in the walls of internal organs and blood vessels, controlled by the autonomic nervous system.

Arteries

Blood vessels that carry oxygenated blood away from the heart to the body's tissues.

Arteriosclerosis

The thickening, hardening, and loss of elasticity of the walls of arteries, often leading to restricted blood flow.