Different components of human blood are replaced at different rates. According to the AABB, a non-profit organization that represents organizations that conduct blood transfusions, plasma is replaced within a few hours of a blood donation while the red blood cells take a few weeks to replace. Doctors usually only remove about one pint of blood during a transfusion, which represents about 10 percent of the total blood volume.Know More
According to Palomar Community College, human blood contains approximately 4,000 different components. These are replaced on a regular basis by different processes in the body. For example, bone marrow produces stem cells which in turn produce red blood cells. Red blood cells live for about 4 months before they are removed and recycled by the spleen. White blood cells, by contrast, only last an average of 18 to 36 hours before they are removed. Occasional white blood cells last for up to 1 year before they are removed. Platelets, which help to form clots, only survive about 10 days before they are removed from the blood stream.
People are usually able to donate blood every 56 days. Blood donations are an important component of health care systems because to date, no synthetic substitute exists, according to the AABB.Learn More
Blood, a liquid made up of plasma and cells, has several functions including controlling body temperature, supplying oxygen and nutrients, removing waste, assisting the immune system and transporting hormones. Blood cells, red and white, are made in bone marrow. Plasma is 90 percent water but contains dissolved substances such as hormones, electrolytes, vitamins and proteins.Full Answer >
Cellular components of blood include red corpuscles, platelets and five kinds of white corpuscles, according to SUNY Downstate Medical Center. The components are suspended in plasma. Red corpuscles, known as erythrocytes, and platelets, known as thrombocytes, perform most functions that occur within blood. Platelets play a key role in blood clotting.Full Answer >
Two adaptations that have been made by the red blood cell are the lack of a nucleus and organelles, or small, specialized bodies in the cell. This allows for more room in the blood cell for hemoglobin.Full Answer >
According to New Health Guide, thin blood is due to insufficient platelets in the blood. This condition is also called thrombocytopenia, and it can be caused by pregnancy or an infection.Full Answer >