Question

multiple choice question
a gland that secretes its product directly into the bloodstream is called a/an
simple gland
compound gland
exocrine gland
endocrine gland

Explanation:

Endocrine glands secrete hormones directly into the bloodstream to regulate various body functions. Exocrine glands secrete substances through ducts to an epithelial surface. Simple and compound glands are classifications based on gland structure, not secretion method into the bloodstream.

Answer:

D. endocrine gland