where the red blood cells formed in human body ?

Answer 1

Red blood cells are formed in your bone marrow.

Answer 2

Red blood cells perform the most important blood duty. A single drop of blood contains millions of red blood cells which are constantly traveling through your body delivering oxygen and removing waste. If they weren't, your body would slowly die.
Red blood cells are red only because they contain a protein chemical called hemoglobin which is bright red in color. Hemoglobin contains the element Iron, making it an excellent vehicle for transporting oxygen and carbon dioxide. As blood passes through the lungs, oxygen molecules attach to the hemoglobin. As the blood passes through the body's tissue, the hemoglobin releases the oxygen to the cells. The empty hemoglobin molecules then bond with the tissue's carbon dioxide or other waste gases, transporting it away.

Over time, the red blood cells get worn out and eventually die. The average life cycle of a red blood cell is 120 days. Your bones are continually producing new blood cells, replenishing your supply. The blood itself, however, is re-circulated throughout your body, not being remade all of the time.

Since the human body is continually making more blood, it is safe for healthy adults to donate blood. The blood is then stored for use in emergency situations. Initially after giving blood, the donor may feel some momentary lightheadedness due to the loss of oxygen-rich red blood cells and blood sugar. The body quickly stabilizes itself.

Answer 3

Multipotent hemopoietic stem cells (MHSC) are stem cells found in the bone marrow. MHSC are the precursor cells which give rise to all the blood cell types of both the myeloid and lymphoid lineages.

Bone marrow - hematopoietic (which can produce blood cells) give rise to the three classes of blood cell that are found in the circulation: white blood cells (leukocytes), red blood cells (erythrocytes), and platelets (thrombocytes)

The process by which red blood cells are produced is called erythropoiesis. Erythrocytes are continuously being produced in the red bone marrow of large bones. (In the embryo, the liver is the main site of red blood cell production.) The production can be stimulated by the hormone erythropoietin (EPO), which is used for doping in sports. Erythrocytes develop in about 7 days and live a total of about 120 days

Answer 4

Red Blood cells (erythrocytes) are formed in the bone marrow, and olde red blood cells are recycled by the spleen to retain the iron.

Answer 5

Bone Marrow.
White ones come from the spleen.

Answer 6

The bone marrow

Answer 7

bone marrow

Answer 8

bone marrow

Answer 9

bone