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Anatomy: Internal male genital organs
Anatomy: External male genital organs
The bladder is an elastic, muscular sac situated in the anterior part of the pelvic cavity. The bladder is designed to be a reservoir for urine as storage before excretion. (Infection of the bladder is called cystitis).
The ureters are the ducts that carry urine from the kidneys to the urinary bladder. The ureters are muscular tubes that can propel urine along by the motions of peristalsis. The ureters are usually 8-12 inches long.
Testis:
Testis is also known as testicle. Part of the male reproductive organs consisting of two oval shaped glands in the scrotum, which produce sperm and the male hormone testosterone. Prior to ejaculation sperm is released from the epididymis which acts as a reservoir of sperm and is added to it to form part of the semen.
Epididymis:
The epididymis is a finely coiled tubular structure, lying next to each testis in the scrotum, which connects the testis to the vas deferens, and through which sperm cells (or spermatozoa) pass and gain in maturity.
Vas deferens:
The vas deferens are two muscular tubes that carry sperm from the epididymis to the seminal vesicles.
Seminal vesicle:
The seminal vesicles are a pair of glands on the posterior surface of the urinary bladder. They secrete a significant proportion of the fluid that ultimately becomes semen. About 60% of the seminal fluid in humans originates from the seminal vesicles.
Ejaculatory duct:
The ejaculatory duct is one of the two passageways that carry semen from the prostate gland to the urethra, through which semen is propelled at the time of ejaculation.
Penis:
The penis is the male external genital organ. Its body consists of two parallel cylindrical bodies, the corpus cavernosum, and beneath them the corpus spongiosum, through which the urethra passes. The penis is homologous with the clitoris in the female. The average size of a non-erect penis (flaccid penis) is about 3 to 4 inches and about 5 inches to 6 inches when the penis is in erection.
The frenulum is a thin strip of flesh on the underside of the penis that connects the penis to the head. It slightly tears during the first sexual relation.
The corpus cavernosum is one of a pair of a sponge-like region of erectile tissue which contain most of the blood in the penis during erection. The term literally means "cave-like body". It is in the corpus cavernosum that are made the intracavernous injections.
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