The correct option is D ; Skin arterioles, eccrine sweat glands, skeletal muscles, and endocrine glands.
Sweat glands are coiled tubular structures that regulate the temperature of the human body. Human sweat glands are classified into three types: eccrine, apocrine, and apoeccrine.
This is related to the blood vessels' thermoregulation role. Vasoconstriction occurs when the blood vessels of the skin (arterioles) contract, limiting blood flow to the skin and thereby minimizing heat loss from the blood arteries of the skin. This saves energy.
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