Multiple Choice
Which structure gives the body smoothness and contour while providing a protective cushion for the skin?
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5. Integumentary System
Introduction to the Integumentary System
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Which layer of the skin forms a watertight barrier to protect the body from dehydration?
A
Hypodermis
B
Stratum basale
C
Dermis
D
Stratum corneum
Verified step by step guidance1
Understand the structure of the skin: The skin is composed of three main layers—epidermis, dermis, and hypodermis. The epidermis is the outermost layer, and it contains several sublayers, including the stratum corneum.
Learn the function of the stratum corneum: The stratum corneum is the outermost layer of the epidermis. It consists of dead keratinized cells that are tightly packed and surrounded by lipids, forming a watertight barrier.
Compare the roles of the other layers: The hypodermis primarily provides insulation and cushioning, the dermis contains connective tissue, blood vessels, and nerves, and the stratum basale (part of the epidermis) is responsible for cell division and regeneration.
Focus on the watertight barrier: The stratum corneum is specifically designed to prevent water loss and protect the body from dehydration, making it the correct answer.
Conclude the reasoning: Based on the structure and function of the skin layers, the stratum corneum is the layer that forms the watertight barrier to protect the body from dehydration.
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