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.
The immune system consists of a network of lymphatic organs, tissues, and cells. These structures are supported by. the reticuloendothelial system: loose connective tissue with a network of reticular fibers. Phagocytic cells, including. monocytes and macrophages, are located in the reticular connective tissue.