The first person to systematically classify bacteria was D.A. Bergey. He published ‘Manual of Determinative Bacteriology’ and kept bacteria under the class Schizomycetes. Bacteria have been divided into six group: ArchaebacteriaActinomycetesRickettsiaChlamydiaMycoplasmaModern bacteria (eubacteria) The two major groups of monerans are, Archaebacteria (ancient bacteria) and eubacteria (true bacteria).Eubacteria is of further of two types – Bacteria … Read moreNovel features of archaebacteria and examples.
Lymphocytes are the central cells of adaptive immunity that bearing antigen receptors. Lymphocytes constitute, 20% to 40% of the body’s white blood cells and 99% of the cell in the lymph. Lymphocytes division by function and cell membrane components, The lymphocytes can be subdivided into three populations types:- B cellsT cellsNatural killer cells B-cells and T-cell have … Read moreCells of immune system involved in adaptive immunity.
Hematopoiesis is the formation and development of red blood cell and white blood cell from a type of cell called hematopoiesis stem cell (HSC). By the third month of gestation, HSGs migrate from the yolk sac to the fetal liver and colonize in the spleen.Liver and spleen play a significant role in hematopoiesis from 3rd … Read moreHow RBC and WBC are formed from hematopoiesis stem cells?