How are red and white blood cells developed?

Red blood cells, most white blood cells, and platelets are produced in the bone marrow, the soft fatty tissue inside bone cavities. Two types of white blood cells, T and B cells (lymphocytes), are also produced in the lymph nodes and spleen, and Tcells are produced and mature in the thymus gland.

Lipid because of the high percentage of carbon to carbon bonds, which store more energy than other bonds.