White blood cells help fight infections in the body by attacking pathogens, such as bacteria and viruses, after they invade the bloodstream. Healthline states that these cells are formed in the bone marrow and circulate ... More » Science Human Anatomy Blood

The major components of the blood are plasma, red blood cells, white blood cells and platelets. Plasma is a yellowish liquid that contains the other components of the blood as well as many different substances. These inc... More » Science Human Anatomy Blood

Blood has three primary functions. It transports oxygen to the body's cells, carbon dioxide to the lungs, and other nutrients throughout the body. Blood also helps regulate body temperature and pH balance and also protec... More » Science Human Anatomy Blood
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White blood cells emerge from the bloodstream through capillaries and engage harmful molecules by either engulfing them or poisoning them. There are different types of white blood cells, which divide between them various... More » Science Human Anatomy Blood

CD4 cells protect the body from infection by circulating in the blood to identify bacteria and viruses then produce antibodies to destroy them. CD4 cells also trigger the body to respond to infection by sending signals t... More » Science Human Anatomy Blood

Red blood cells carry waste from the cells to the lungs. Once this happens, the lungs remove the waste from the body by exhalation. More » Science Human Anatomy Blood

When red blood cells are placed in distilled water, which is hypotonic compared to the solution contained within the cells' membranes, the distilled water will diffuse into the red blood cells and cause them to burst. Pl... More » Science Human Anatomy Blood