Which gland type is most similar in structure to sudoriferous glands?

The apocrine gland is most similar in structure to sudoriferous glands, as both types are involved in the secretion of sweat and have a similar anatomical composition. Apocrine glands, which are a subtype of sudoriferous glands, are typically associated with hair follicles and secrete a thicker, milky fluid that becomes odorous when broken down by skin bacteria.

In contrast, eccrine glands, another type of sudoriferous gland, are distributed widely across the body and primarily responsible for regulating body temperature through the secretion of a watery sweat. Although eccrine and apocrine glands both produce sweat, their structural and functional characteristics differ.

Sebaceous glands, meanwhile, are associated with hair follicles and secrete sebum, which is an oily substance that helps to lubricate the skin and hair rather than contributing to perspiration. Lastly, the term exocrine gland refers to a broader category of glands that secrete substances through ducts, which does not specifically relate to the structure of sudoriferous glands. Therefore, the structural similarity and specific functional relation of apocrine glands to sudoriferous glands make this choice the most accurate.