Blood cells

Human blood is composed of several different cell types: Red blood cells, white blood cells, and platelets. Another word for blood cell is haematopoietic cell or hemocyte. Together, these blood cells comprise a total of 45%. The remaining volume is composed of the blood plasma.

Illustration of different blood cells. Red Blood Cells appear flat and disk-like shaped without a nucleus. Platelets appear as small cell fragments shaped like a star, they are also anucleated. White blood cells are represented as lymphocytes, monocytes, basophils, neutrophils, and eosinophils. Lymphocytes are big cells with a big nucleus, almost taking all the cytoplasmic space. Monocytes have an indented nucleus shaped like a kidney bean. Basophils contain granules in their cytoplasm and a bi-lobed nucleus. Neutrophils have an irregularly shaped nucleus with two to five lobes. And eosinophils are depicted with a bi-lobed nucleus and granules in their cytoplasm.

Figure 1: Blood cells. Neutrophil, monocyte, eosinophil, basophil, and lymphocyte are types of white blood cells.