Caste: Caste, any of the ranked, hereditary, endogamous social groups, often linked with occupation, that together constitute traditional societies in South Asia, particularly among encyclopÃdia britannica
Reticuloendothelial System (RES). a system of cells of mesenchymal origin in vertebrate animals and in man that can be converted to actively mobile phagocytic cells (macrophages).I.I.eticuloendothelial System (RES). a system of cells of mesenchymal origin in vertebrate animals and in man that can be converted to actively mobile phagocytic cells (macrophages). I.I.
1 It is divided into four lobes of unequal size and shape. 2  It is important to understand the complex blood flow (hepatic and portal systems) through the liver.  Parenchyma (reticuloendothelial cells) enhances with contrast uniformly with portal vein and hepatic artery branches seen through it.