File:Epididymis histology 02.jpg: Difference between revisions

Revision as of 19:09, 27 May 2013

Ductulus Efferens

Spermatozoa pass from convoluted tubules through:

tubuli recti (low columnar epithelium)
rete testis (flattened or cuboidal epithelium)
ductuli efferentes (lined by a columnar epithelium)

Ductuli efferentes

epithelium consist of both absorptive and ciliated cells.
- height of the two cells types is variable giving the lumen a characteristic wavy outline.
leave the testis and open into a common duct, the ductus epididymidis (about 6 m long).

ductus epididymidis

lined by a tall pseudostratified columnar epithelium.
principal cells have long stereocilia.
- Stereocilia are non-motile structures that in the EM resemble large microvilli.
basal cells of the ductus epididymidis regenerate the epithelium.

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-==Ductulus Efferen==
+==Ductulus Efferens==
-Spermatozoa pass through
+Spermatozoa pass from convoluted tubules through:
 # tubuli recti (low columnar epithelium)
-* rete testis (flattened or cuboidal epithelium)
+# rete testis (flattened or cuboidal epithelium)
-* ductuli efferentes (lined by a columnar epithelium)
+# ductuli efferentes (lined by a columnar epithelium)
- which consists of both absorptive and ciliated cells. The height of the two cells types which form the epithelium of the ductuli efferentes is variable which gives the lumen a characteristic wavy outline.
+Ductuli efferentes
+* epithelium consist of both absorptive and ciliated cells.
+** height of the two cells types is variable giving the lumen a characteristic wavy outline.
+* leave the testis and open into a common duct, the ductus epididymidis (about 6 m long).
-The ductuli efferentes leave the testis and open into a common duct, the ductus epididymidis (about 6 m long!). It is lined by a very tall pseudostratified columnar epithelium. Most cells of the epithelium, also called principal cells, have long stereocilia. Stereocilia are non-motile structures, which in the EM resemble large microvilli. Towards the basal lamina we see a number of small nuclei, which belong to the basal cells of the ductus epididymidis. These cells regenerate the epithelium.
+===ductus epididymidis===
+* lined by a tall pseudostratified columnar epithelium.
+* '''principal cells''' have long stereocilia.
+** Stereocilia are non-motile structures that in the EM resemble large microvilli.
+* '''basal cells''' of the ductus epididymidis regenerate the epithelium.