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This is an accepted version of this page This is the latest accepted revision, reviewed on 1 December 2024. Sac of skin that protects the testicles For the obsolete dinosaur fossil name, see Megalosaurus § "Scrotum humanum". Scrotum Human scrotum in a relaxed state (left) and a tense state (right) Details Precursor Labioscrotal swellings System Reproductive system Artery Anterior scrotal ...
In many species, the vas deferens ends in a small sac for storing sperm. [ 21 ] The only vertebrates to lack any structure resembling a vas deferens are the primitive jawless fishes , which release sperm directly into the body cavity, and then into the surrounding water through a simple opening in the body wall.
Spermatophore, a mass of spermatozoa, a sperm sac passed between reproductive partners. [1] Spermatheca, an organ in females that stores sperm for later use, the sperm sac. [2] Milt, sperm sacs, large sacs containing large amounts of matured sperm. [3] [4] Epididymis, a part of the extended testes region that stores sperm, the sperm sac. [5] [6]
ot. The genital ridge from which either the ovary or testis is formed. o. The left ovary: t. Testis in the place of its original formation; t', together with the dotted lines above, indicates the direction in which the testis and epididymis descend from the abdomen into the scrotum. Skene's glands a.k.a. paraurethral gland: pr. Prostate: u. Uterus.
The testes are covered by a tough fibrous shell called the tunica albuginea. [5] Under the tunica albuginea, the testes contain very fine-coiled tubes called seminiferous tubules. [5] The tubules are lined with a layer of cells that develop from puberty through old age into sperm cells (also known as spermatozoa or male gametes). [5]
The spermatic cord is the cord-like structure in males formed by the vas deferens (ductus deferens) and surrounding tissue that runs from the deep inguinal ring down to each testicle. Its serosal covering, the tunica vaginalis, is an extension of the peritoneum that passes through the transversalis fascia. Each testicle develops in the lower ...
It carries with it the ductus deference, which are testicular vessels and nerves, a portion of the abdominal muscle, and lymph vessels. All of the structures remain attached to the testis and form what is known as the spermatic cord. By the time the testis is in the scrotal sac, the gubernaculum is no more than a remnant of scar like tissue. [10]
The visceral layer of tunica vaginalis of testis (lamina visceralis tunicae vaginalis testis) [4] is the portion of the tunica vaginalis that covers the testis and epididymis. It is the superficial-most of the three layers that constitute the capsule of the testis, with the tunica albuginea of testis situated deep to it.