Comparative Histomorphological Study of Spleen in Goat, Sheep, Cow and Buffalo

Abstract

Immunity in some animals, such as goats, stands for unique properties by which they withstand unpleasant environments. Spleen influences animals' immunity through its hematopoietic and immunological roles. Because of that, we emphasized the average morphological and histological properties of the Goat, Sheep, Cow and Buffalo spleen. We randomly collected three spleens for every species from healthy slaughtered Goats, Sheep, Cows and Buffalo. All the animals were adult and weighed about 71, 80, 400 and 500 grams, respectively. Histological cutting was followed according to the paraffin method; then, the samples were ready for microscopic exam. The structure results revealed that the spleen of animals is supported externally by a thick fibromuscular connective tissue capsule, which vascularizes by subcapsular sinus. Stromal trabeculae emerge from the capsule, entering the splenic parenchyma. The parenchyma of animals' spleen differentiates into white pulp, which organizes into the periarterial lymphatic sheath along with lymph nodules, red pulp ropes in splenic sinuses among splenic cords, and marginal zone in which macrophage occupies excellent importance. This study concluded that the amount of smooth muscle in the spleen septa in goats was more than in the rest of the experimental animals. Keywords: Histomorphology; Spleen; Goat; Sheep; Cow; Buffalo