The testicle or testis is the male gonad in animals. source
The testicle or testis is the male gonad in animals.
The testicles (testes) are components of both the reproductive system and the endocrine system. source
The testicles (testes) are components of both the reproductive system and the endocrine system.
The primary functions of the testes are to produce sperm (spermatogenesis) and to produce androgens, primarily testosterone. source
The primary functions of the testes are to produce sperm (spermatogenesis) and to produce androgens, primarily testosterone.
Both functions of the testicle are influenced by gonadotropic hormones produced by the anterior pituitary. source
Both functions of the testicle are influenced by gonadotropic hormones produced by the anterior pituitary.
Almost all healthy male vertebrates have two testicles. source
Almost all healthy male vertebrates have two testicles.
The primitive jawless fish have only a single testis, located in the midline of the body. source
The primitive jawless fish have only a single testis, located in the midline of the body.
The testicles of a dromedary camel are 7–10 cm (2.8–3.9 in) long, 4.5 cm (1.8 in) deep and 5 cm (2.0 in) in width. source
The testicles of a dromedary camel are 7–10 cm (2.8–3.9 in) long, 4.5 cm (1.8 in) deep and 5 cm (2.0 in) in width.
The right testicle is often smaller than the left. source
The right testicle is often smaller than the left.
The testicles of a male red fox attain their greatest weight in December–February. source
The testicles of a male red fox attain their greatest weight in December–February.
Spermatogenesis in male golden jackals occurs 10–12 days before the females enter estrus and, during this time, males' testicles triple in weight. source
Spermatogenesis in male golden jackals occurs 10–12 days before the females enter estrus and, during this time, males' testicles triple in weight.
In healthy European adult humans, average testicular volume is 18 cm³ per testis, with normal size ranging from 12 cm³ to 30 cm³. source
In healthy European adult humans, average testicular volume is 18 cm³ per testis, with normal size ranging from 12 cm³ to 30 cm³.
The average testicle size after puberty measures up to around 2 inches long, 0.8 inches in breadth, and 1.2 inches in height (5 x 2 x 3 cm). source
The average testicle size after puberty measures up to around 2 inches long, 0.8 inches in breadth, and 1.2 inches in height (5 x 2 x 3 cm).
Human testicles are smaller than chimpanzee testicles but larger than gorilla testicles. source
Human testicles are smaller than chimpanzee testicles but larger than gorilla testicles.
The size of the testicles is among the parameters of the Tanner scale for the maturity of male genitals. source
The size of the testicles is among the parameters of the Tanner scale for the maturity of male genitals.
Many anatomical features of the adult testis reflect its developmental origin in the abdomen. source
Many anatomical features of the adult testis reflect its developmental origin in the abdomen.
Testicles are fully descended before one reaches puberty. source
Testicles are fully descended before one reaches puberty.
Testicular size as a proportion of body weight varies widely. source
Testicular size as a proportion of body weight varies widely.
The testicles are well-known to be very sensitive to impact and injury. source
The testicles are well-known to be very sensitive to impact and injury.
Some jockstraps are designed to provide support to the testicles. source
Some jockstraps are designed to provide support to the testicles.
