Men have as little as 25% of the sperm production that they had in the past. One theory is that the wearing of tight pants and underwear allow the testicles to become too warm.
In 85% of men, the right testicle hangs lower than the left.
According to Wikipedia: “In the Middle Ages, men who wanted a boy sometimes had their left testicle removed. This was because people believed that the right testicle made “boy” sperm and the left made “girl” sperm. As early as 330 BC, Aristotle prescribed the ligation (tying off) of the left testicle in men wishing to have boys.”
A single ejaculation contains more than 100 million sperm.
Semen is secreted by the prostate gland, not the testicles.
An instrument to determine the volume (size) of testicles is called an orchidometer.
Removal of one or both testes is called orchidectomy, or orchidotomy. Sometimes orchidotomy is used to refer to surgery within a testicle, rather than removing the testicle.
As children are growing, their testicles are said to go through Tanner stages. An instrument to determine Tanner stages consists of several testicle shaped beads on a string of graduated sizes. The testicles are palpated and compared to one of the synthetic testicles on the instrument.
An average adult testicle measures up to 5 cm × 2 cm × 3 cm (2 in × 3⁄4 in × 1+1⁄4 in).
Men with large testicles produce proportionately more sperm.
The outer layer of testicles, called the tunica albuginea is rubbery and thick and very resistant to rupture or puncture. Testicles have been compared to raw chicken gizzards. It is nearly impossible to burst a testicle with finger pressure alone, although any such attempt would cause great pain.
Young men are prone to a condition called testicular torsion, in which the testicle can rotate on the spermatic cord. This cuts off circulation to the testicle. It is a medical emergency that needs attention before the testicle dies. The repair is open surgery in which the testicle is rotated back so the blood can flow again. If the testicle returns to it’s pinkish white state, permanent sutures are applied from the testicle to the scrotum to keep it from rotating again and the scrotum is closed. If the testicle remains black, it must be removed.
Only one testicle is required for normal sperm production and hormonal regulation.
In the same way a golf boll contains tightly woven rubber bands, the testicles contain lots of tiny tubes called seminiferous tubules in which the sperm are produced.
Behind and above each testicle is a coiled tubular structure called the epididymis. In the epididymis, the sperm mature and are eventually transported through a tube called the vas deferens to the prostate gland.
Vasectomy is a procedure in which the vas deferens on each side is tied with sutures and severed. This has no effect on the blood flow to the testicles and no effect on hormone production. All it does is stops sperm from flowing to the prostate gland.
Most vasectomies are painless soon after the procedure. Every now and then, a man will suffer great and ongoing pain after a vasectomy.
Each testicle and it’s spermatic cord is covered with a muscle called the cremasteric muscle. These are responsible for retraction of the testicles higher into the scrotum or into the abdominal cavity.
Most men will have a involuntary reaction of the cremasteric muscles that will raise the testicles if the inner thighs are lightly stroked.
Testicles form in the lower abdominal cavity, and normally descend into the scrotum by infancy. If by adolescence a testicle hasn’t descended, surgical intervention is a good idea to prevent possible cancer, pain or infertility. A suture is applied to the bottom of the testicle, passed through the scrotum, and sometimes anchored with an ordinary clothing button under the scrotum until the testicle is eventually induced to stay down in the scrotum.
Testicular cancer is a rare condition that mostly affects young men. Annual palpation of the testicles by a medical professional is recommended.
Harmless cysts called spermatocele can form in the epididymis which can be alarming to men when they detect these bumps within their scrotums.
A condition called ‘blue balls’ is uncommon but quite real. Prolonged sexual arousal can create fluid congestion in the testicles and prostate that becomes mildly painful.
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