Plasma is mostly water that is absorbed from ingested food and fluid by the intestines. There should be between 150,000 and 400,000 platelets per microliter of blood.īone marrow produces red blood cells, white blood cells, and platelets, and from there they enter the bloodstream. Platelets interact with clotting proteins to prevent or stop bleeding. What does it mean if a person has a high white blood cell count? Platelets, or thrombocytes Higher or lower levels of white blood cells can indicate disease. The number of white blood cells in a microliter of blood usually ranges from 3,700–10,500. White blood cells make up less than 1% of blood content, forming vital defenses against disease and infection. What percentage of red blood cells should people have in their body? White blood cells, or leukocytes The expected number of red blood cells in a single drop (microliter) of blood is 4.5–6.2 million in males and 4.0–5.2 million in females. The human body produces around 2 million blood cells every second. The life span of a red blood cell is 4 months, and the body replaces them regularly. Hemoglobin is a protein that contains iron and carries oxygen to its destination. They transport oxygen to and from the lungs.

Red blood cells have a slightly indented, flattened disk shape. Each of these has a vital role to play in keeping the blood functioning effectively.įind out what plasma donation involves. The remaining 45% of blood mainly consists of red and white blood cells and platelets. Plasma is 92% water, and the contents of the remaining 8% include: Plasma accounts for around 55% of blood fluid in humans. Share on Pinterest Micro Discovery/Getty Images

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