Key takeaway
Twelve pairs and their jobs
Before you read
Test yourself first: 3 questions
Question 1 of 3
How many pairs of cranial nerves does the human body have?
Answer: B. There are 12 pairs of cranial nerves (and 31 pairs of spinal nerves).
Question 2 of 3
The epidermis differs from the dermis in that the epidermis:
Answer: A. Three layers from outside in: epidermis (outer, avascular), dermis (vessels, nerves, glands), hypodermis (fat and insulation).
Question 3 of 3
The outermost layer of the skin is the:
Answer: A. The epidermis is the outer, avascular layer. Beneath it lies the dermis (vessels, nerves, glands) and then the hypodermis or subcutaneous layer.
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