What is the epithelial lining of the epididymal duct?
pseudostratified columnar epithelium
The epididymal duct is lined by a pseudostratified columnar epithelium, with tall columnar cells and shorter basal cells giving the appearance of two rows of nuclei. This pseudostratified epithelium lines not only the epididymis but also the vas deferens.
What connective tissue are in epididymis?
The epididymal epithelium is supported by loose connective tissue. The loose connective tissue of a mucosa is called lamina propria, and typically has a fairly high proportion of cells with immune function.
What epithelial tissue is in the testes?
germinal epithelium
The germinal epithelium is the epithelial layer of the seminiferous tubules of the testicles. It is also known as the wall of the seminiferous tubules. The cells in the epithelium are connected via tight junctions. There are two types of cells in the germinal epithelium.
What cells make up the epididymis?
The epididymal epithelium contains four major cell types: principal, basal, clear, and halo cells [1, 3]. Principal cells are the most abundant cells and play a major role in secretion and absorption [1, 4]. Tight junctions between principal cells form the blood-epididymis barrier (rat [5, 6]).
What type of epithelium is in vas deferens?
The vas deferens is lined by a pseudostratified columnar epithelium composed of columnar cells and basal cells. The luminal surface of the columnar cell is lined by stereocilia. The epithelial layer contains folds, which become progressively complex toward the ampulla.
What is the lining epithelium of Tubuli Recti?
The tubuli recti are lined by cuboidal epithelium. There are approximately 1500 tubuli recti (or their analogous seminiferous tubule segments).
Is the epididymis a tissue?
The walls of the epididymis are lined in pseudostratified columnar epithelial tissue, meaning that the arrangement of the cells gives the appearance of two layers, although it is only one.
Does epididymis have microvilli?
It is lined by ciliated cuboidal epithelial cells that also contain microvilli. The activity of the cilia helps to move the spermatozoa along the tube, as they are immobile until they reach the epididymis. The microvilli absorb excess materials, including protein and potassium, from the seminal fluid.
What type of tissue is found in the male reproductive system?
The epithelium is generally simple columnar, and consists of two cell types, taller cells have with cilia and shorter cells without cilia. The efferent duct is the only portion of the male tract displaying true, motile, cilia. These tubules may also have a thin layer of smooth muscle around them.
What are the three parts of epididymis?
The epididymis is a narrow, tightly-coiled tube connecting rear of the testicles to the deferent duct (ductus deferens or vas deferens). The epididymis consists of three parts: head, body, and tail. The head of the epididymis is located on superior pole of testis. It stores sperm for maturation.
Are Sertoli cells in the epididymis?
The terms blood-testis barrier (BTB) or blood-epididymis barrier (BEB), are often described as Sertoli cell-Sertoli cell tight junctions (TJs) or TJs between the epithelial cells in the epididymis, respectively.
Is ciliated epithelium present in vas deferens?
The mature vas deferens has a pseudostratified ciliated columnar epithelium in addition to a basal cell layer.
What type of epithelium covers the epididymis?
The epididymis is covered by a two layered pseudostratified epithelium. The epithelium is separated by a basement membrane from the connective tissue wall which has smooth muscle cells. The major cell types in the epithelium are: Principal cells: columnar cells that, with the basal cells, form the majority of the epithelium.
Where are basal cells found in the epididymis?
Basal cells also appear on the entire epididymis. They lie at the base and are considered precursors of the principal cells. Apical cells are mostly found in the region of head with numerous mitochondria in cytoplasm. The clear cells are present in the tail region.
What type of lymphocytes are found in the epididymis?
Intraepithelial lymphocytes: distributed throughout the tissue. The stereocilia of the epididymis are long cytoplasmic projections that have an actin filament backbone. These filaments have been visualized at high resolution using fluorescent phalloidin that binds to actin filaments. The stereocilia in the epididymis are non-motile.
What is the difference between inguinal and epididymal adipose tissue?
Inguinal adipose tissue has smaller adipocytes than epididymal adipose tissue. Ten-week-old C57BL6/J mice ( N = 5) fed a 60% high-fat diet for 6 weeks were sacrificed and epididymal (eWAT) and inguinal (iWAT) adipose tissue depots harvested, fixed, sectioned and adipocytes counted using the MetaMorph method described herein.