An analogous formula applies to the case of a continuous probability distribution. Not every probability distribution has a defined mean; see the Cauchy distribution for an example. Moreover, for some distributions the mean is infinite: for example, when the probability of the value is for n = 1, 2, 3, ....
Red blood cell (RBC) production (erythropoiesis) takes place in the bone marrow under the control of the hormone erythropoietin (EPO). Juxtaglomerular cells in the kidney produce EPO in response to decreased O 2 delivery (as in anemia and hypoxia) and increased levels of androgens.
Summary: 1.Red bone marrow is the bone marrow that produces red blood cells, white blood cells, and platelets while the yellow bone marrow produces fat cells. 2.Red bone marrow helps the body in its everyday functions while the yellow bone marrow helps the body survive extreme cases of hunger and blood loss.