A Comparative Histological Structure of the Spleens of Carcharhinus leucas (Müller & Henle, 1839) and Pisodonophis boro (Hamilton, 1822)

Abstract

The present study aimed to compare the histological structure of the spleens between Carcharhinus leucas (Müller & Henle, 1839) and Pisodonophis boro (Hamilton, 1822). Histologically, the spleen of C. leucas was covered with a thick capsule and then its capsule protruded into the central zone, as called trabeculae. Two main components including white and red pulps are present from this event. The white pulp contained an aggregation of the diffuse lymphatic tissue and small lymphatic nodule, which stained more slightly eosinophila. Whereas the most region of the red pulp was a connective tissue and the ellipsoid was not observed Nevertheless, several cellular classifications including red blood cells (erythrocytes), thrombocyte, granulocyte, reticular cell and lymphocyte could be basically found in this region. Based on a histological comparison of the spleens between C. leucas and P. boro, they were slightly different. However, it was found that the numerous penicillar arteries were scattered throughout the red pulp of the P. boro spleen.