Penis and Testicles

The penis is made up of several parts:

• The shaft or body of the penis (from the top of the penis to where it connects to your lower body).
• The glans or the head or tip of the penis, which may be covered by foreskin. This is where the opening of your urethra (pee hole) is, where urine and semen come out.
• The foreskin is a layer of skin that covers the head of the penis. The foreskin and glans are lightly joined at birth and usually separate around puberty. If you forcefully pull it back, it may tear.
• The length of the foreskin determines how much of the glans is covered when the penis is flaccid or erect. 

Note: Some people don’t have a foreskin because it was removed through a procedure called circumcision. 

• The frenulum is where the foreskin meets the bottom of the penis. It usually looks like a little V below the head of the penis. Many people who are circumcised will still have a frenulum and it can be very sensitive to touch.

The scrotum is the sac or pouch of skin that holds the testicles below the penis. The scrotum may change depending on temperature – when it’s cold, it can pull the testicles tighter to the body. If it’s hot, it can loosen and allow the testicles to hang away from the body to regulate temperature. The muscle that is responsible for moving your scrotum and testicles closer or further away from your body is called the cremaster.

The testicles (or “balls”) are two ball-like glands that hang in the scrotum. It is common for one testicle to hang lower than the other. Not everyone will have two visible testicles (because of surgery or if one testicle has not descended from inside the body). The testicles produce sperm and hormones, including testosterone.

The urethra is the long inner tube in your body that brings pee from the bladder out through the penis. Usually, the pee hole is on the tip of the head but some people’s urethra is on the underside of the penis’ shaft because of a condition called hypospadia.

The prostate is an internal gland that is found between the bladder and penis just in front of the rectum. It is roughly the size of a golf ball and creates a fluid that makes up part of semen. It is sensitive to the touch and many people find it pleasurable to stimulate the prostate through the wall of the rectum.

The root of the penis is the part of the penis that is tucked up inside the pelvis and attached to the pubic bone. 

The tube where the sperm matures and sits prior to ejaculation. The epididymis connects each testicle to its vas deferens (the tube that carries the sperm out during an ejaculation).

The narrow long tube that carries sperm from the epididymis to the seminal vesicles where it is then turned into semen before it is ejaculated.

Two small organs located below your bladder that produce a fluid that makes up part of semen. 

The milky fluid that sperm moves around in, which comes out during ejaculation. 
 

Located under the prostate and attached to your urethra, these glands produce pre-ejaculate (also known as pre-cum) which helps lubricate your urethra, making it easier for semen to move around and get pushed out during ejaculation.