Noun
A testicle.
Source: Webster's dictionaryAll these observations lead to a consensus that a dominant gene that determines testis development ( TDF ) must exist on the human Y chromosome. Source: Internet
An individual that produces both types of gametes is called hermaphrodite (a name applicable also to people with one testis and one ovary). Source: Internet
The human testis secretes high levels of testosterone from about week 8 of fetal life until 5–6 months after birth (a similar perinatal surge in testosterone is observed in many species), a process that appears to underlie the male phenotype. Source: Internet
The caecum, a long, white organ, is found next to the ovary or testis. Source: Internet
He adds, “Here, organs were collected from developing mice soon after the gonad began to take on characteristics specific to a testis or ovary.” Source: Internet
Males do not possess these organs, but instead have a large testis in place of the ovary, and a spermatophoric gland and sac. Source: Internet