The male reproductive system is made up two main parts.
1. The External
2. The internal parts
The External Organs
It has its root in the perineum with the lower 2/3rd of the body suspended outside in front of the scrotal sac. It is made up of three bundles of spong-like erectitle tissues:
1. 2 the corporal cavernosa on the lateral columns in front of the urethra
2. The corpus spongiosum on the posterior column which contains the urethra enclosed in a firm sheath of firm tissue with rich blood supply and covered with the skin. The skin continues with the scrotum and the groins. The skin double fold backwards on itself at the glans penis to form the prepuce (foreskin) which is usually removed during circumcision. The penis transmites a portion of the urethra which acts as a passage for semen as well as excretion of urine… During sexual excitement the pe nis becomes larger, rounder, firmer and erect to be able to penetrate and deposit semen near the cervix. Stimulation of the nervous system increases blood supply to the organ.
This erections tart at puberty and may result in wet dream in adolescent boy. There is a small sphincter in the urethra which prevent semen from entering the bladder and urine from the urethra mixing with the semen during intercourse.
It is a sensitive pouch-like sac covered with wrinkled skin and hair from which the penis hangs. It lies in front of the thighs, behind the penis and is thickly pigmented. The scrotum is divided by a fibrous septum called Dartos muscle into two cavities each of which contain a testis epididymis and initial portion of the vas deference. The muscles contract in cold weather and relax in hot weather to ensure normal temperature around the testes. Next to the clartos muscle lies the cremaster muscle and fascia. It protects the testes from injuries.