Multiple Choice
All of the following structures are considered to be accessory structures of the skin EXCEPT:
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5. Integumentary System
Introduction to the Integumentary System
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The conjunctiva is:
A
the outermost layer of the skin
B
a mucous membrane that lines the eyelids and covers the anterior surface of the eye
C
a layer of connective tissue beneath the dermis
D
a gland that produces sweat
Verified step by step guidance1
Understand the conjunctiva's anatomical location and function: The conjunctiva is a mucous membrane that lines the inner surface of the eyelids and covers the anterior surface of the sclera (the white part of the eye). It plays a role in protecting the eye and maintaining moisture.
Eliminate incorrect options: The conjunctiva is not part of the skin layers, so 'the outermost layer of the skin' is incorrect. Similarly, it is not a gland that produces sweat, nor is it a layer of connective tissue beneath the dermis.
Focus on the correct description: The conjunctiva is specifically a mucous membrane, which is a type of tissue that secretes mucus to keep the eye moist and protect it from debris and pathogens.
Relate the conjunctiva to its physiological role: Highlight that the conjunctiva contributes to the immune defense of the eye and helps maintain a smooth surface for the eyelid to glide over during blinking.
Confirm the correct answer: Based on the anatomical and physiological characteristics, the correct description of the conjunctiva is 'a mucous membrane that lines the eyelids and covers the anterior surface of the eye.'
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