Histological studies on the spleen of large white Yorkshire Pig (Sus scrofa)

The microscopic studies of 6 spleens showed that the capsule was composed of smooth muscle, collagenous and elastic fibers. Trabeculae were emerged from the capsule and entered into parenchyma and subdivided it into smaller compartments by forming a net like framework. Splenic parenchyma was composed of white and red pulps. White pulp was lymphoreticular tissue consisted of lymphatic nodule and peri- arterial lymphatic sheath. Peri-arterial lymphatic sheath and Splenic nodules were abundant in pig spleen. Ellipsoids (pericapillary macrophage sheath) were especially large and abundant in the marginal zone, the region between the red and white pulp. Red pulp was consisted of pulp arterioles, sheathed capillaries, terminal capillaries, splenic sinusoids and splenic cords. The splenic sinusoids were less abundant and poorly developed.