What is testis vs testicle?

Testis and testicle are two terms that are often used interchangeably to refer to the same reproductive organ found in male organisms. However, there is a slight difference between the two in terms of their usage and meaning.

Testis is the medical term used to describe the male reproductive organ responsible for producing sperm and the hormone testosterone. It is a paired organ, meaning that it comes in a pair, and is located in the scrotum. The testis is made up of several structures, including the seminiferous tubules, interstitial cells, epididymis, and vas deferens.

On the other hand, testicle is a more informal term used to refer to the same male reproductive organ. However, it is generally used in the singular form to refer to one of the two testes present in males. In other words, testicle is a colloquial term for testis.

In summary, the main difference between testis and testicle is that testis is the medical term used to describe the male reproductive organ, whereas testicle is a less formal term, mainly used in the singular form, to refer to one of the two testes present in males.