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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.
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. The uterine tube of the right side is marked m. va. Vagina: vh. Ductus aberrans: vs ...
Epididymal cysts is a mass that forms in the epididymis. [10] These cysts differ from spermatoceles as they contain clear fluid, rather than seminal fluid. In addition, spermatoceles are more likely to be found on the head of the epididymis. [19] Other abnormalities can be detected during male genital examination including Peyronie's disease.
Until about the ninth week of gestational age, [4] the external genitalia of human males and females look the same, and follow a common development. This includes the development of a genital tubercle and a membrane dorsally to it, covering the developing urogenital opening , and the development of the labioscrotal fold .
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]
WAP four-disulfide core domain protein 2 - also known as Human Epididymis Protein 4 [5] (HE4) - is a protein that in humans is encoded by the WFDC2 gene. [ 6 ] [ 7 ] [ 8 ] HE4 is a tumor marker of ovarian cancer , with 80% sensitivity at a cut-off of 150 pmol/L. [ 9 ]
Complete diagram of a human spermatozoon Schematic of subcellular structures in a murine spermatid being formed showing the formation of the residual body and acrosomal cap. The process of spermiogenesis is traditionally divided into four stages: the Golgi phase, the cap phase, formation of the tail, and the maturation stage. [1]