Grade 12 Skin Anatomy Worksheet
A Grade 12 Biology worksheet covering the structure and function of human skin, including its layers, cells, and accessory organs.
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Grade 12 Skin Anatomy
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Read each question carefully and answer to the best of your ability. Refer to the provided diagram where necessary.
Observe the diagram below showing a cross-section of the human skin. Identify the labeled structures.
1. A:
2. B:
3. C:
4. D:
5. E:
6. Which of the following layers of the skin is primarily composed of adipose tissue and serves as an insulator?
Epidermis
Dermis
Hypodermis
Stratum corneum
7. Keratinocytes are the most abundant cells in the epidermis. What is their primary function?
Produce melanin
Provide immune defense
Synthesize vitamin D
Produce keratin for protection
8. The glands produce an oily secretion called sebum, which lubricates the skin and hair.
9. Melanocytes are responsible for producing , a pigment that protects the skin from UV radiation.
10. The outermost layer of the epidermis, consisting of dead, flattened cells, is called the .
11. Briefly explain the role of Langerhans cells in the epidermis.
12. Describe two functions of the integumentary system.
13. The dermis is avascular, meaning it lacks blood vessels.
True
False
14. Hair follicles are found in the epidermis.
True
False