The hematopoietic system is a system of organs of the body responsible for the constancy of the composition of the blood. Since formed elements are continuously destroyed in the body (for example, platelets disintegrate after about a week), the main function of the hematopoietic organs is the constant replenishment of the cellular elements of the blood - hematopoiesis or Hemopoiesis (Latin haemopoiesis). The main components of the hematopoietic system are the bone marrow, lymph nodes and spleen.
In the bone marrow, erythrocytes, various forms of leukocytes and platelets are formed. Lymph nodes are involved in the processes of hematopoiesis, producing lymphocytes, plasma cells. The spleen consists of the so-called. red and white pulp. The red pulp is filled with blood cells, mainly erythrocytes; The white pulp is formed by lymphoid tissue in which lymphocytes are produced. In addition to the hematopoietic function, the spleen captures damaged erythrocytes, microorganisms and other elements alien to the body that have entered the blood from the blood stream; it produces antibodies.
