Chronic Lymphocytic Leukemia (CLL)

The process of making blood cells is called hematopoiesis hematopoiesis: (hi-mat-uh-poy-EE-suss) The process of making blood cells in the bone marrow. . Blood cells are made in the bone marrow bone marrow: The soft, spongy tissue inside most bones. Blood cells are formed in the bone marrow. . That's a spongy tissue located inside some bones. It contains young parent cells called stem cells. These blood-forming stem cells can grow into all 3 types of blood cells – red cells, white cells and platelets. These blood-forming stem cells make copies of themselves, and they also produce mature blood cells. When blood cells are fully mature and functional, they leave the bone marrow and enter the blood. Healthy people have enough stem cells to keep making all the blood cells they need every day.

Blood is made of blood cells floating in plasma plasma: The fluid part of the blood. Plasma is mostly made of water with chemicals in it. These chemicals include proteins, hormones, minerals, and vitamins. . The plasma is mostly made of water with chemicals in it. These chemicals include proteins, hormones, minerals and vitamins.

There are three basic types of blood cells. These include:

1. Red blood cells (RBCs) are also called erythrocytes. They make up almost half of blood. Red blood cells are filled with hemoglobin hemoglobin: A protein in the red blood cells. Hemoglobin picks up oxygen in the lungs and brings it to cells in all parts of the body. . That's a protein that picks up oxygen in the lungs and brings it to cells all around the body.
2. White blood cells (WBCs) are also called leukocytes. They fight disease and infection by attacking and killing germs that get into the body. There are several kinds of white blood cells, each of which fights a different kind of germ.
3. Platelets are also called thrombocytes. They are small pieces of cells that help blood clot and stop bleeding.