- Trabecular veins
Infobox Vein
Name = PAGENAME
Latin =
GraySubject = 278
GrayPage = 1286
Caption = Section of the spleen, showing the termination of the small bloodvessels.
Caption2 = Transverse section of the spleen, showing the trabecular tissue and the splenic vein and its tributaries.
DrainsFrom = sinus
DrainsTo =Splenic vein
Artery =Trabecular arteries
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DorlandsPre =
DorlandsSuf =
The trabecular veins are the largest veins inside thespleen . It drains the blood collected in the sinuses of the pulp.Details
The blood is collected from the interstices of the tissue by the rootlets of the
veins , which begin much in the same way as thearteries end.The
connective-tissue corpuscles of the pulp arrange themselves in rows, in such a way as to form an elongated space or sinus.They become elongated and spindle-shaped, and overlap each other at their extremities, and thus form a sort of
endothelial lining of the path or sinus, which is the radicle of a vein.On the outer surfaces of these cells are seen delicate transverse lines or markings, which are due to minute elastic fibrillæ arranged in a circular manner around the sinus.
Thus the channel obtains an external investment, and gradually becomes converted into a small vein, which after a short course acquires a coat of ordinary connective tissue, lined by a layer of flattened epithelial cells which are continuous with the supporting cells of the pulp.
The smaller veins unite to form larger ones; these do not accompany the arteries, but soon enter the trabecular sheaths of the capsule, and by their junction form six or more branches, which emerge from the
hilum , and, uniting, constitute thelienal vein , the largest radicle of theportal vein .External links
* - "Lymphoid Tissues and Organs: spleen, central artery and trabecular vein"
* [http://www.udel.edu/Biology/Wags/histopage/colorpage/cst/cst.htm Slide at udel.edu]
* (See figure #16)
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