| Abstrakt: |
The current study aimed to identify the morphological and histological structure of spleen in H. javanicus and S. carolinensis. The results of the present study showed that the spleen in H. javanicus is a longitudinal, compressed from both sides. On the other side, the spleen of S. carolinensis was with a tongue-like shape that contains a lateral curvature in one side, the color of the spleen in both studies animals is reddish brown and is located on the left side of the abdominal cavity behind the stomach. The spleen is surrounded by a thick capsule of fibrous connective tissue that consists of collagen fibers, elastic fibers, smooth muscle fibers, blood vessels, nerve vessels and fibroblast. Furthermore, the capsule is surrounded by an external layer of mesothelial cells and Trabeculae are extending from capsule which penetrate the spleen tissue and divide it into lobules. The spleen tissue is divided into two distinct regions, the white pulp and the red pulp, in addition to a borderline area between the white and red pulp that called marginal zone. The white pulp is lymph nodules that appear widespread in the spleen tissue and take different spherical or vesicle forms in H. javanicus ; while in S. carolinensis, the lymph nodules appear as vesicles or irregularly shaped that spread in spleen. The lymph nodules are consisting of lymphocytes, macrophages and plasma cells. Additionally, the white pulp is made up of the germinal center; each lymph node contains of (1-2) of central arteriol. The red pulp consists of reticular lymphoid tissue containing numerous vessels, sinuses and the spleen cords be can observed which consist of reticular fibers and lymphocytes that are arranged in the form of cords. [ABSTRACT FROM AUTHOR] |
