Glands, such as the thyroid, that secrete their products directly into the blood rather than through ducts are classified as ________.

Glands, such as the thyroid, that secrete their products directly into the blood rather than through ducts are classified as ________.

Glands, such as the thyroid, that secrete their products directly into the blood rather than through ducts are classified as ________. 










A) exocrine
B) endocrine
C) sebaceous
D) ceruminous













Answer: B