Functional grammar is a linguistic theory that states all constituents, whether affixes, words, phrases, or sentences, have semantic, syntactic, and pragmatic functions.Functional grammarians can classify linguistics as semantic, pragmatic, morphosyntactic, or phonological.he most famous of these is Systemic Functional Grammar, which was first published by British linguist Michael Halliday in 1961. Other functional grammars include Danish Functional Linguistics, lexical functional grammar, and Role and Reference Grammar.
hematopoiesis. the formation and development of blood cells, usually taking place in the bone marrow. cyclic hematopoiesis of collies. see canine cyclic hematopoiesis.[hÄâ²mÉtÅpÅÂ·Äâ²sis, hemâ²-]. Etymology: Gk, haima + poiein, to make. the normal formation and development of blood cells in the bone marrow. In severe anemia and other hematologic disorders, cells may be produced in organs outside the marrow (extramedullary hematopoiesis).xtramedullary hematopoiesis. the formation of and development of blood cells outside the bone marrow, as in the spleen, liver and lymph nodes. fetal hematopoiesis. in embryogenesis migration of stem cells from the yolk sac blood islands sets up hematopoiesis in thymus, lymph nodes, liver and spleen.
Confidence votes 4.3K. Hematopoiesis is the general term meaning blood cell formation. Erythropoiesis is specifically the formation of red blood cells. Lymphopoiesis is specifically the formation of Lymphoid cells (types of white blood cells).