About 5 percent of year-old men and between 15 and 25 percent of year-old men experience ED.
The opening of the urethra, the tube that transports semen and urine, is at the tip of the glans penis.
Penis — The penis is the male organ for sexual intercourse.
The penis also contains a number of sensitive nerve endings.
The testes singular, testis are located in the scrotum a sac of skin between the upper thighs.
Erectile dysfunction ED is another common problem seen in aging males.
During ejaculation, semen passes through the ducts and exits the body via the penis.
Prostate hypertrophy is usually benign, but cancer of the prostate is one of the more common cancers in elderly men.
In the male fetus, the testes develop near the kidneys, then descend into the scrotum just before birth.
Circumcision is usually done during a baby boy's first few days of life.
The number of sperm in a single ejaculate ranges from 40 million to million — the average is about million 1.
Each sperm is extremely small: