TASK 3 COMPONENTS OF BLOOD AND TRANSPORT OF OXYGEN
Blood components are red cells, white cells, platelets and plasma. These can be put to different uses.
RED BLOOD CELLS
Red blood cell also known as erythrocytes make up 45% of blood volume lacks nucleus and contains the oxygen-carrying protein haemoglobin, which is a pigment that gives whole blood its red colour. Erythrocytes are produced inside of red bone marrow. Its main function is to distribute oxygen to body tissue, and carry waste carbon dioxide back to lungs. In addition to its key role in transporting oxygen and carbon dioxide, haemoglobin also plays a role in the regulation of blood flow and blood pressure.
WHITE BLOOD ...view middle of the document...
T cells attack invading viruses, cancer cells, and transplanted tissue cells. Natural killer cells attack wide variety of infectious microbes and certain spontaneously arising tumour cells. Monocytes they function in differentiating into macrophages, which are larger phagocytic cells and digest pathogens, death neutrophils, and the debris of dead cells like lymphocytes, they also present antigens to activate other immune cells. (Tortora G J, Derrickson B, 2011, p729-742) (Star C, McMillan B 2001, p138-141)
Platelets also known as thrombocytes these are tiny fragments of cells are crucial in helping blood to clot and the formation of scabs. Hemopoietic stem cells also differentiate into cells that produce platelets. Platelets help to stop blood loss from damaged blood vessels by forming a platelet plug. Platelets secrete vasoconstrictors which constrict blood vessels. Plasma carries all blood cells.
Plasma is the non-cellular or liquid portion of the blood that makes about 55% of the blood’s volume. Plasma process this to extract other products such as Albumin this protein is really useful when treating anyone who has been severely shocked. Plasma carries glucose, proteins other nutrients. Plasma protein fibrinogen plays essential role in blood clotting process. Plasma protein globulins help attacks viruses and bacteria. Alpha and beta globulins transport irons, lipids, and fatty soluble vitamins. ( Tortora G J, Derrickson B, 2011, p729-742)
Oxygen is transported by haemoglobin as oxyhemoglobin within red blood cells. Haemoglobin has a high affinity for oxygen each molecule can carry four oxygen molecules. In the lungs, oxygen joins to haemoglobin in red blood cells to form oxyhaemoglobin. This is a reversible reaction when oxygen leaves oxyhaemoglobin (dissociates from it) near the body cells, it turns back to haemoglobin. Affinity...