Why we need blood

Blood

What is Blood? Share some About Donating Blood Donor Basics,  what is Blood is essential to life. Blood circulates through our body and delivers essential substances like oxygen and nutrients to the body’s cells. It also transports metabolic waste products away from those same cells. There is no substitute for blood. It cannot be made or manufactured. Generous blood donors are the only source of blood for patients in need of a blood transfusion. Blood Components There are four basic components that comprise human blood: plasma, red blood cells, white blood cells and platelets. Red Blood Cells Red blood cells represent 40%-45% of your blood volume. They are generated from your bone marrow at a rate of four to five billion per hour. They have a lifecycle of about 120 days in the body.

•  PLATELETS:-Platelets are an amazing part of your blood. Platelets are the smallest of our blood cells and literally look like small plates in their non-active form. Platelets control bleeding. Wherever a wound occurs, the blood vessel will send out a signal. Platelets receive that signal and travel to the area and transform into their “active” formation, growing long tentacles to make contact with the vessel and form clusters to plug the wound until it heals. 
• PLASMA:- Plasma is the liquid portion of your blood. Plasma is yellowish in color and is made up mostly of water, but it also contains proteins, sugars, hormones and salts. It transports water and nutrients to your body’s tissues. White Blood Cells Although white blood cells (leukocytes) only account for about 1% of your blood, they are very important. White blood cells are essential for good health and protection against illness and disease. Like red blood cells, they are constantly being generated from your bone marrow. They flow through the bloodstream and attack foreign bodies, like viruses and bacteria. They can even leave the bloodstream to extend the fight into tissue.

Blood is essential to life. Blood circulates through our body and delivers essential substances like oxygen and nutrients to the body’s cells. It also transports metabolic waste products away from those same cells. There is no substitute for blood. It cannot be made or manufactured. Generous blood donors are the only source of blood for patients in need of a blood transfusion. Blood Components There are four basic components that comprise human blood: plasma, red blood cells, white blood cells and platelets. Red Blood Cells Red blood cells represent 40%-45% of your blood volume. They are generated from your bone marrow at a rate of four to five billion per hour. They have a lifecycle of about 120 days in the body. Platelets Platelets are an amazing part of your blood. Platelets are the smallest of our blood cells and literally look like small plates in their non-active form. Platelets control bleeding. Wherever a wound occurs, the blood vessel will send out a signal. Platelets receive that signal and travel to the area and transform into their “active” formation, growing long tentacles to make contact with the vessel and form clusters to plug the wound until it heals. Plasma Plasma is the liquid portion of your blood. Plasma is yellowish in color and is made up mostly of water, but it also contains proteins, sugars, hormones and salts. It transports water and nutrients to your body’s tissues. White Blood Cells Although white blood cells (leukocytes) only account for about 1% of your blood, they are very important. White blood cells are essential for good health and protection against illness and disease. Like red blood cells, they are constantly being generated from your bone marrow. They flow through the bloodstream and attack foreign bodies, like viruses and bacteria. They can even leave the bloodstream to extend the fight into tissue.



In vertebrates, it is composed of blood cells suspended in blood plasma. Plasma, which constitutes 55% of blood fluid, is mostly water (92% by volume),[2] and contains proteins, glucose, mineral ions, hormones, carbon dioxide (plasma being the main medium for excretory product transportation), and blood cells themselves. Albumin is the main protein in plasma, and it functions to regulate the colloidal osmotic pressure of blood. The blood cells are mainly red blood cells (also called RBCs or erythrocytes), white blood cells (also called WBCs or leukocytes) and platelets (also called thrombocytes). The most abundant cells in vertebrate blood are red blood cells. These contain hemoglobin, an iron-containing protein, which facilitates oxygen transport by reversibly binding to this respiratory gas and greatly increasing its solubility in blood. In contrast, carbon dioxide is mostly transported extracellularly as bicarbonate ion transported in plasma.



National blood inventory We manage the national supply of blood products for all the provinces and territories (excluding Quebec). Many variables can impact our inventory such as weather, holidays or tragic events. Below is an overview of our inventory levels across all blood types.    Good supply 9days of inventory on hand. Inventory level for blood type AB+ positive When the Inventory is over 10 days, AB+ is needed less. When the Inventory for AB+ is below 8 days, AB+ is especially needed. Good supply 10days of inventory on hand. Inventory level for blood type AB- negative When the Inventory for AB- is below 8 days, AB- is especially needed. Good supply 5days of inventory on hand. Inventory level for blood type A+ positive When the Inventory for A+ is below 8 days, A+ is needed. Good supply 5days of inventory on hand. Inventory level for blood type A- negative When the Inventory for A- is below 8 days, A- is especially needed. Good supply 5days of inventory on hand. Inventory level for blood type B+ positive When the Inventory is over 10 days, B+ is needed less. When the Inventory for B+ is below 8 days, B+ is especially needed. Good supply 4days of inventory on hand. Inventory level for blood type B- negative When the Inventory for B- is below 8 days, B- is especially needed. Good supply 5days of inventory on hand. Inventory level for blood type O+ positive When the Inventory for O+ is below 8 days, O+ is especially needed. Good supply 4days of inventory on hand. Inventory level for blood type O- negative When the Inventory for O- is below 8 days, O- is especially needed. Find a donor centre

The total amount of blood in humans varies with age, sex, weight, body type, and other factors, but a rough average figure for adults is about 60 millilitres per kilogram of body weight. An average young male has a plasma volume of about 35 millilitres and a red cell volume of about 30 millilitres per kilogram of body weight. There is little variation in the blood volume of a healthy person over long periods, although each component of the blood is in a continuous state of flux. In particular, water rapidly moves in and out of the bloodstream, achieving a balance with the extravascular fluids (those outside the blood vessels) within minutes. The normal volume of blood provides such an adequate reserve that appreciable blood loss is well tolerated. Withdrawal of 500 millilitres (about a pint) of blood from normal blood donors is a harmless procedure. Blood volume is rapidly replaced after blood loss; within hours, plasma volume is restored by movement of extravascular fluid into the circulation. Replacement of red cells is completed within several weeks. The vast area of capillary membrane, through which water passes freely, would permit instantaneous loss of the plasma from the circulation were it not for the plasma proteins—in particular, serum albumin. Capillary membranes are impermeable to serum albumin, the smallest in weight and highest in concentration of the plasma proteins. The osmotic effect of serum albumin retains fluid within the circulation, opposing the hydrostatic forces that tend to drive the fluid outward into the tissues.