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The epididymis is present in male reptiles, birds, mammals, and cartilaginous fish. [1] The caput epididymidis is fused to the testis in eutherian mammals, but not in marsupials. [13] In reptiles, there is an additional canal between the testis and the head of the epididymis and which receives the various efferent ducts.
The reptilian testis and epididymis typically undergo seasonal recrudescence coupled to the breeding season. All reptiles retain their testes and excurrent ducts within the abdomen (testicond). Generally, the reptilian epididymis does not exhibit the same degree of anatomical regionalization [4] compared to
Epididymitis is a medical condition characterized by inflammation of the epididymis, a curved structure at the back of the testicle. [1] Onset of pain is typically over a day or two. [ 1 ] The pain may improve with raising the testicle. [ 1 ]
ot. The genital ridge from which either the ovary or testis is formed. o. The left ovary: t. Testis in the place of its original formation; t', together with the dotted lines above, indicates the direction in which the testis and epididymis descend from the abdomen into the scrotum. Skene's glands a.k.a. paraurethral gland: pr. Prostate: u. Uterus.
A testicle or testis (pl. testes) is the gonad in all male bilaterians, including humans, and is homologous to the ovary in females. Its primary functions are the production of sperm and the secretion of androgens, primarily testosterone. The release of testosterone is regulated by luteinizing hormone (LH) from the anterior pituitary gland.
The epididymis is a long whitish mass of tightly coiled tube. The sperm that are produced in the seminiferous tubules flow into the epididymis. During passage via the epididymis, the sperm undergo maturation and are concentrated by the action of ion channels located on the apical membrane of the epididymis. [2]
[5] [6] [7] The evolutionary adaptive advantage of testicular descent into an extra-abdominal position may be related more to the enhanced sperm storage capacity of the epididymis at lower extra-abdominal temperatures than to the testis itself. [7] Greater sperm storage capacity in the epididymis has been associated with enhanced fertility.
The sperm in the testes move to the epididymis which is a long, coiled tube behind the testes. The primary function is to store and mature sperm so it can fertilize the egg. However, if the epididymis becomes injured, then there is a chance that the sperm will not mature and a man will not be able to reproduce with a woman.