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For subscribersMale genital tract

Any subscription — Bac or Medicine — opens all three radiology studies, all fourteen mechanisms, every identify set and every QCM question — plus the body's regions on their own and the reproductive specimens.

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Reproductive System

Male genital tract

An assembly line with one exit · Organa genitalia masculina

About 100 million sperm made a day, each taking some 70 daysevery single day

Testis, epididymis, glands and urethra — a continuous line that makes cells, matures them for weeks, and adds most of their fluid at the last moment.

Key facts

Size: Testis about 4.5 cm; the epididymal duct, uncoiled, about 6 m
Weight: Testis 15–25 g each; prostate about 20 g at twenty
Location: The testes outside the abdomen, the glands and ducts deep in the pelvis
Function: Makes sperm and testosterone, and delivers them

Did you knowSperm leave the testis unable to swim. They acquire motility while travelling the epididymis — a duct six metres long coiled into a structure the size of a thumbnail.

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Microscopic view

Seminiferous epithelium

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Male and female tracts

Function animation

Makes sperm and testosterone, and delivers them

Clinical notes

Red flags

Sudden severe testicular pain, often with vomiting, is torsion — the testis is lost in hours, so it goes to theatre on the story rather than on a scan.
A painless lump arising from the testis itself is a tumour until proven otherwise, and it is the commonest cancer of young men.
A man who suddenly cannot pass urine at all needs the bladder drained before anything else is discussed.

Benign prostatic hyperplasia
Prostate cancer
Testicular torsion
Varicocele
Epididymo-orchitis
Testicular cancer
Erectile dysfunction
Male infertility

Where it works

Reproductive System

Gonads that make gametes and hormones, ducts that carry them, and the glands and outlets that serve the journey — one plan, expressed two ways.

Also in this system

Key facts

Size

Testis about 4.5 cm; the epididymal duct, uncoiled, about 6 m

Weight

Testis 15–25 g each; prostate about 20 g at twenty

Location

The testes outside the abdomen, the glands and ducts deep in the pelvis

Function

Makes sperm and testosterone, and delivers them

Did you knowSperm leave the testis unable to swim. They acquire motility while travelling the epididymis — a duct six metres long coiled into a structure the size of a thumbnail.