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Scanning electron microscopic studies on the microvascular system of the spleen in the rat, cat, dog, pig, horse and cow



Scanning electron microscopic studies on the microvascular system of the spleen in the rat, cat, dog, pig, horse and cow



Nihon Juigaku Zasshi. Japanese Journal of Veterinary Science 47(2): 237-249



Structural details of the sheathed artery, arterial capillary and splenic sinus of the spleen were comparative-morphologically studied by scanning and transmission electron microscopy in the rat, cat, dog, pig, horse and cow. The network of the sheathed artery contained platelets and erythrocytes, but no other blood cells, except for macrophages in the dog. Slits with diameter of 1-3 5 .mu.m were found between the endothelial cells in all species except for the dog. The terminal portions of the arterial capillaries were sack-shaped in the rat, dog, pig and horse, and were funnel-shaped in the cow. These portions had small pores communicating with the cordal spaces. Some arterial capillaries opened into the splenic cords in the rat, but opened directly into the sinuses in the others. The endothelial cells of the sinus were rod-shaped in the rat, dog and cow, but flat stellate-shaped in the cat and horse, and in the pig they were both types. The walls of the sinus had slits through which blood cells and macrophages pased from the sinusal lumen to the cordal space or vice versa. Reticular cells toughed on the outside of the endothelial cells of the sinus.

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Accession: 006365010

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PMID: 4010125

DOI: 10.1292/jvms1939.47.237



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