Male Reproductive System

1. Male ReproductiveSystem Chapter 9

2. Cross-section

3. Cremaster Muscles

4. Testicle

5. Endocrine’s influence

7. Sperm

8. Prostate Gland • linked closely with the urinary system • secretes much of the liquid portion of semen, the milky fluid that transports sperm through the penis when a man ejaculates. • The prostate is located just beneath the bladder, where urine is stored, and in front of the rectum. It encircles, like a donut, a section of the urethra. The urethra is the tube that carries urine front the bladder out through the penis. During ejaculation, semen is secreted by the prostate through small pores in the urethra's walls. • The prostate is made up of three lobes encased in an outer covering, or capsule. It is flanked on either side by the seminal vesicles, a pair of pouch-like glands that contribute secretions to the semen. Next to the seminal vesicles run the two vas deferens, tubes that carry sperm from the testicles. The testicles, in addition to manufacturing sperm, also produce testosterone, a male sex hormone that controls the prostate's growth and function.

10. Peyronie's disease • inflammation and scar tissue form along the shaft of the penis • Can be caused by a botched circumcission

11. Phimosis • the foreskin is tightly stretched around the head of the penis and cannot be pulled back freely. • Phimosis can occur naturally. • For example, in boys younger than age 4, it is normally difficult to retract the foreskin. • However, in older boys and men, phimosis often is triggered by an infection under the foreskin (balanitis) or by other medical conditions such as diabetes.

12. Balanitis • An infection or inflammation of the head (glans) of the penis. • Non-circumcised, this area is covered by a flap of skin known as the foreskin, or prepuce. • can occur in both circumcised and uncircumcised men, although it occurs more commonly in men who are not circumcised.

14. Spermatogensis