The secretion of by the anterior pituitary gland a. corpus luteum b. luteinizing hormone c. follicle-stimulating hormone d. thyroixine

answer; the tunica intima also called tunica interna, consists of elastic fibers,connective tissue and smooth muscle cells;

organ system-an organ system is a group of organs that work together to perform one or more functions. each does a particular job in the body, and is made up of certain tissues.