The proper functioning of the body's immune system depends in part on the activity of the
(A) thyroid gland
(B) thymus gland
(C) parathyroid gland
(D) adrenal gland
Answer: B
The proper functioning of the body's immune system depends in part on the activity of the
(A) thyroid gland
(B) thymus gland
(C) parathyroid gland
(D) adrenal gland
Answer: B