Erythropoiesis. The process through which new red blood cells are created; it begins in the bone marrow. Mentioned in: Porphyrias. the formation of red blood cells (erythrocytes) from stem cells in the bone marrow.
2 Unicelluar organisms are one-celled organisms or microorganisms. Although they are living things that are only one cell, they still need to carry out all 6 characteristics of life. For example, they must feed, digest, excrete wastes and reproduce. They are very small and surround you every day by the millions.
The unicellular body is formed by single cell while body of Multicellular is of multiple cells. In unicellular organism the work is divided at the organelle level, while in Multicellular it involves cellular, tissue, organ and organ system level. In unicellular organism a single cell is responsible tocarry the life, while in Multicellular organism special cells are focused to carry out distinct cellular duties.