Bone marrow: Adult

Blood cells exit hemopoietic tissue to enter the circulatory system by passing through the walls of thin-walled sinusoids. Mature, non-nucleated red blood cells as well as nucleated white blood cells are visible in these sinusoids.

Blood cells exit hemopoietic tissue to enter the circulatory system by passing through the walls of thin-walled sinusoids. Mature, non-nucleated red blood cells as well as nucleated white blood cells are visible in these sinusoids.

Megakaryocytes are extremely large cells that possess a single, highly lobulated, polyploid nucleus. Megakaryocytes produce platelets which form by fragmenting from the cell. During development, megakaryocytes undergo atypical nuclear divisions resulting in polyploid nuclei that contain three or more multiples of the diploid number of chromosomes.

Megakaryocytes are extremely large cells that possess a single, highly lobulated, polyploid nucleus. Megakaryocytes produce platelets which form by fragmenting from the cell. During development, megakaryocytes undergo atypical nuclear divisions resulting in polyploid nuclei that contain three or more multiples of the diploid number of chromosomes.