On the surface of each columnar cell there are about 600 very fine projections called microvilli that further increase the absorptive area of each villus. Villi of the intestine move in swaying, contracting motions. These movements are believed to increase the flow of blood and lymph and to enhance absorption.
The primary hormones involved in the functioning of the male reproductive system are follicle stimulating hormone (FSH),Luteinizing hormone (LH) and Testosterone.
