The human body is capable of replacing the plasma from one pint of blood within 24 hours, while it takes four to six weeks for the body to completely replace the red blood cells from one pint of blood, according to the American Red Cross. For this reason, eight weeks is required between donations of blood to ensure the health and safety of the donor.Know More
After donating blood, the American Red Cross recommends drinking an additional 32 ounces of non-alcoholic fluids, refraining from any heavy lifting or exercising for five hours and eating healthy, iron-rich meals. A loss of strength or faintness may occur after giving blood. For this reason, it is important not to perform any activity that would put one's self or others in danger within several hours of donation. In the case of feeling dizzy or light-headed, lying down with the feet elevated until the feeling passes is recommended.
Donating blood is simple and helps to save lives. The entire process of blood donation takes just over an hour, with the actual blood draw lasting for just under 10 minutes. The remainder of the time is spent taking a medical history and mini-physical, then recovering after the blood draw is complete.Learn more about Blood
Blood of the AB type has both A antigens and B antigens carried on red blood cells but lacks both A and B antibodies in its plasma. These characteristics make the AB blood type the most restricted with regard to red cell transfusions but a universal donor for plasma transfusions.Full Answer >
Blood has four components: plasma, red blood cells, white blood cells and platelets. Plasma is the liquid component of blood, in which the other three components are suspended. Red blood cells comprise about 40 percent of the blood's volume, while plasma makes up more than half of the volume.Full Answer >
Hemoglobin is a red protein found in the red blood cells of vertebrates that carries oxygen from the lungs to body tissues. Hemoglobin also carries carbon dioxide from body tissues back to the lungs.Full Answer >
According to Santa Barbara City College, red blood cells' biconcave shape gives them a vastly greater surface area than a spherical cell of similar volume, which allows them to absorb oxygen more efficiently. Red blood cells achieve this shape by losing their nucleus and many other organelles during development. Red blood cells can neither reproduce nor replenish cellular machinery, and they die off in large numbers over time.Full Answer >