Blood clumping, also known as agglutination, occurs when different blood types are mixed. This may prove fatal when it occurs inside the body.Continue Reading
In humans, the blood is an essential component that functions in the transportation of vital substances to and from the body, regulation of internal mechanisms and defense against foreign particles that invade the body. The primary constituents of blood include plasma, red blood cells, white blood cells and platelets.
In 1901, the Austrian scientist Karl Landsteiner identified the ABO blood group. This discovery vastly improved the success of medical blood transfusions. The ABO blood group comprises four blood types: A, B, AB and O. Each blood type is determined by the presence or absence of antigens and antibodies. Antibodies are found in the blood plasma while antigens are attached to the surface of the red blood cells. When different blood types are combined, the antigens from one type bind to the antibodies of the other type, which results to clumping or agglutination. The clumped blood may constrict the blood vessels and prevent the proper circulation of blood. Agglutination may also trigger the red blood cells to rupture and spill their hemoglobin content, which becomes poisonous once outside the cell and may even cause the death of the individual.Learn more about Blood
Blood in humans is red, not blue. It is a misconception that human blood is blue and turns red upon touching oxygen in the air.Full Answer >
Blood moves through veins when it is pushed by muscle contractions. Unlike arteries, which carry blood away from the heart in response to the rhythmic contractions of the left ventricle, veins are a low-pressure system that pushes blood toward the heart by means of a series of smooth muscle contractions known as peristalsis.Full Answer >
Blood and blood-forming tissue are both connective tissues. Other types of connective tissues include loose connective tissue such as adipose tissue, dense connective tissue such as tendons and support tissue such as cartilage and bone.Full Answer >
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 >