Question

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what do you know about your integumentary system: its components and its functions?
a the integumentary system is an organ system consisting of the kidneys, bladder, ureters, and ureathra.
b eccrine sudoriferous glands of the skin excrete waste products out of the body.
c the largest organ of the human body is the skin.
d vitamin d is produced by ultraviolet (uv) light striking the skin.
e the epidermis does not contain any blood or blood vessels. the cells of the epidermis receive nutrients via diffusion of fluids from the dermis.
f during a state of hypothermia, the skin is able to reduce body temperature through sweating and vasodilation.

Explanation:

• Option A: The integumentary system consists of skin, hair, nails, and glands, not kidneys, bladder, ureters, and urethra (which are part of the urinary system). So, this option is incorrect.
• Option B: Eccrine sudoriferous (sweat) glands secrete sweat, which contains waste products like urea, salts, etc. So, they do excrete waste products out of the body. This option is correct.
• Option C: The skin is indeed the largest organ of the human body. This option is correct.
• Option D: When ultraviolet (UV) light strikes the skin, a form of cholesterol in the skin is converted into vitamin D. This option is correct.
• Option E: The epidermis is avascular (has no blood vessels). Its cells receive nutrients via diffusion from the dermis (which has blood vessels). This option is correct.
• Option F: During hyperthermia (not hypothermia), the skin reduces body temperature through sweating and vasodilation. Hypothermia is a state of low body temperature, and in that case, the body tries to conserve heat (e.g., through vasoconstriction). So, this option is incorrect.

Answer:

B. Eccrine sudoriferous glands of the skin excrete waste products out of the body.
C. The largest organ of the human body is the skin.
D. Vitamin D is produced by ultraviolet (UV) light striking the skin.
E. The epidermis does not contain any blood or blood vessels. The cells of the epidermis receive nutrients via diffusion of fluids from the dermis.