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Questions and Answers
What is the outer layer of a cell covering an organism called?
What is the outer layer of a cell covering an organism called?
- Epidermis (correct)
- Basal layer
- Dermis
- Subcutaneous layer
What is the thick layer of living tissue below the epidermis called?
What is the thick layer of living tissue below the epidermis called?
Dermis
What is the name of the lowermost layer of the integumentary system in vertebrates?
What is the name of the lowermost layer of the integumentary system in vertebrates?
Subcutaneous layer
What is the deepest layer of the five layers of the epidermis called?
What is the deepest layer of the five layers of the epidermis called?
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What is the horny outer layer of the skin known as?
What is the horny outer layer of the skin known as?
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What do you call a mature melanin-forming cell?
What do you call a mature melanin-forming cell?
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Study Notes
Skin Structure and Layers
- Epidermis: The outer protective layer of skin, serving as the first barrier against environmental elements.
- Dermis: The thick, supportive layer beneath the epidermis that contains essential components like blood vessels, nerves, sweat glands, and hair follicles, making it vital for skin's functionality.
- Subcutaneous Layer: The deepest layer of the skin, also known as the hypodermis, which provides insulation and cushioning for underlying tissues and organs.
Epidermis Composition
- Basal Layer: The innermost layer of the epidermis consisting of basal cells that divide and replenish skin cells, crucial for maintaining healthy skin turnover.
- Stratum Corneum: The outermost layer of the epidermis, consisting of dead skin cells that form a protective barrier and help prevent water loss.
Pigmentation
- Melanocytes: Specialized cells in the basal layer that produce melanin, contributing to skin coloration and protection against UV radiation.
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