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The head (Latin: caput). The head of the epididymis receives spermatozoa via the efferent ducts of the mediastinium of the testis [3] at the superior pole of the testis. [2]: 1296 The head is characterized histologically by a thick epithelium with long stereocilia (described below) and a little smooth muscle. [3]
Adult human testicle with epididymis: A. Head of epididymis, B. Body of epididymis, C. Tail of epididymis, and D. Vas deferens. Those aged 15 to 35 are most commonly affected. [2] The acute form usually develops over the course of several days, with pain and swelling frequently in only one testis, which will hang low in the scrotum. [3]
The head is the largest and most easily identified portion of the epididymis. It is located superolateral to the upper pole of the testicle and is often seen on paramedian views of the testis. The normal epididymal body and tail are smaller and more variable in position. [citation needed]
They differ in size according to their position, those in the middle of the gland being larger and longer. The lobules are conical in shape, the base being directed toward the circumference of the organ, the apex toward the mediastinum testis.
The human vas deferens measures 30–35 cm in length, and 2–3 mm in diameter. [3]: 1297 It is continuous proximally with the tail of the epididymis, [3]: 1296 and exhibits a tortuous, convoluted initial/proximal section (which measures 2–3 cm in length).
Section of a testicle of a steer, blood vessels injected with red gelatine. 1 parenchyma, 2 mediastinum testis, 3 tunica albuginea, 4 tail of epididymis, 5 head of epididymis, 6 spermatic cord with convoluted testicular artery
The tubuli seminiferi recti (also known as the tubuli recti, tubulus rectus, or straight seminiferous tubules) are structures in the testicle connecting the convoluted region of the seminiferous tubules to the rete testis, although the tubuli recti have a different appearance distinguishing them from these two structures.
1. Epididymis 2. Head of epididymis 3. Lobules of epididymis 4. Body of epididymis 5. Tail of epididymis 6. Duct of epididymis 7. Deferent duct (ductus deferens or vas deferens) Specialty: Urology: Symptoms: Severe testicular pain, elevated testicle [1] Complications: Infertility [2] Usual onset: Sudden [1] Types: Intravaginal torsion ...