Testicle

The blood–testis barrier is a physical barrier between the blood vessels and the seminiferous tubules of the animal testes.

A eunuch (/ˈjuːnək/; Greek: εὐνοῦχος) is a man who has been castrated, typically early enough in his life for this change to have major hormonal consequences.

The scrotum is an anatomical male reproductive structure that consists of a suspended sack of skin and smooth muscle that is dual-chambered, present in most terrestrial male mammals and located under the penis.

Testicular cancer is cancer that develops in the testicles, a part of the male reproductive system.

A hydrocele (Br English: hydrocoele) denotes a pathological accumulation of serous fluid in a body cavity.

Testicular torsion occurs when the spermatic cord (from which the testicle is suspended) twists, cutting off the testicle's blood supply, a condition called ischemia.

The epididymis (/ɛpᵻˈdɪdᵻmɪs/; plural: epididymides /ɛpᵻdᵻˈdɪmədiːz/ or /ɛpᵻˈdɪdəmɪdiːz/) is a tube that connects a testicle to a vas deferens in the male reproductive system.

A Sertoli cell (a kind of sustentacular cell) is a "nurse" cell of the testicles that is part of a seminiferous tubule and helps in the process of spermatogenesis; that is, the production of sperm.

Spermatogenesis is the process in which spermatozoa are produced from spermatogonial stem cells by way of mitosis and meiosis.

A varicocele is an abnormal enlargement of the pampiniform venous plexus in the scrotum.

Orchitis /ˌɔːrˈkaɪtɪs/ or orchiditis /ˌɔːrkɪˈdaɪtɪs/ (from the Ancient Greek ὄρχις meaning "testicle"; same root as orchid) is inflammation of the testes.

Cryptorchidism is the absence of one or both testes from the scrotum.

Anorchia (or anorchism) is an XY disorder of sex development in which individuals have both testes absent at birth.

The testicular artery (the male gonadal artery, also called the internal spermatic arteries in older texts) is a branch of the abdominal aorta that supplies blood to the testis.

Seminiferous tubules are located within the testes, and are the specific location of meiosis, and the subsequent creation of male gametes, namely spermatozoa.