Biology · Reproduction

Testes are composed largely of seminiferous tubules—coiled tubes, the walls of which contain cells that produce sperm—and are surrounded by a capsule, the tunica albuginea. Seminiferous tubules may constitute up to 90 per cent of the testis.

Diagram:

https://radiopaedia.org/cases/testis-cross-section

The male urethra is a narrow fibromuscular tube that conducts urine and semen from the bladder and ejaculatory ducts, respectively, to the exterior of the body.

The epididymis is a narrow, tightly-coiled tube that is attached to each of the testicles (the male sex glands that produce sperm). Sperm cells move from the testicles into the epididymis, where they finish maturing and are stored.

The fallopian tube, also called the oviduct or uterine tube, is a pair of long narrow ducts located in the human female abdominal cavity that transport male sperm cells to the egg, provide a suitable environment for fertilisation, and transport the egg from the ovary, where it is produced, to the central channel (lumen) of the uterus.

Testes are composed largely of seminiferous tubules—coiled tubes, the walls of which contain cells that produce sperm—and are surrounded by a capsule, the tunica albuginea. Seminiferous tubules may constitute up to 90 per cent of the testis.