The thyroid gland:
a. secretes clacitonin
b. arises from the base of the pharynx
c. contains about 100,000 follicles
d. has follicles lines a single layer of cells
a. secretes clacitonin
b. arises from the base of the pharynx
c. contains about 100,000 follicles
d. has follicles lines a single layer of cells