Category Archives: Histology

Vas Deferens

The vas deferens, also called ductus deferens, is part of the male anatomy, they transport sperm from the epididymis in anticipation ofejaculation.

There are two ducts, connecting the left and right epididymis to the ejaculatory ducts in order to move sperm. Each tube is about 30 centimeters long and is muscular (surrounded by smooth muscle). Its epithelium is lined by stereocilia.

They are part of the spermatic cords.

During ejaculation the smooth muscle in the walls of the vas deferens contracts reflexively, thus propelling the sperm forward. This is also known as peristalsis. The sperm is transferred from the vas deferens into the urethra, collecting secretions from the male accessory sex glands such as the seminal vesicles, prostate gland and the bulbourethral glands, which form the bulk of semen. (adapted from wikipedia)

NYU virtual microscopy (link)

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Thyroid Histology

Thyroid virtual microscopy

NYU virtual microscopy (link)

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Sublingual gland histology

Unlike the parotid gland, the submandibular and sublingual glands possess both mucous and serous secretory cells. In this slide, the gland is stained with mucicarmine which specifically stains mucus red.


Sublingual gland (virtual microscopy) Univ Michigan (link)

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Endochondral Bone Formation

Endochondral ossification, (endochondral bone formation) is one of the two essential processes during fetal development of the mammalian skeletal system by which bone tissue is created. Unlike intramembranous ossification, which is the other process by which bone tissue is created, cartilage is present during endochondral ossification. It is also an essential process during the rudimentary formation of long bones, the growth of the length of long bones, and the natural healing of bone fractures. (adapted from wikipedia)

NYU virtual microscopy (link)

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