Blood

• Total volume of blood is approximately 4-6 liters.
• Blood is the collection of cells that have been specialized to perform certain functions.
• About 55% of blood is plasma, 44% is red blood cells, 1% is white blood cells, and 1% are platelets.
• Plasma is the main portion of the blood that the other blood cells are suspended in and it maintains blood volume and pressure.
• Erythrocytes, or red blood cells, are produced by the red bone marrow and have a biconcave shape.
• Erythrocytes contain hemoglobin, a protein that carries oxygen.
• Erythrocytes do not have a nucleus and are found within the plasma.
• Leukocytes, or white blood cells, increase in number when fighting an infection.
• Leukocytes are granulocytes (neutrophil, eosinophil, basophil) or agranulocytes (monocyte, lymphocyte).
• Leukocytes contain proteins and lipids and are found within the blood plasma.
• Platelets, or thrombocytes, are found in the blood plasma and are made in the bone marrow, specifically in the center of the bone, in the soft/spongy area.
• Platelets do not contain a nucleus and last about 7-10 days within the body.
• Platelets help the body prevent blood loss through clotting.
• Thromboplastin initiates the blood clotting process in the presence of calcium.
• Fibrin is a protein that acts as a mesh over the wound to stop the bleeding.
• The clotting process involves clotting factors, which are proteins in the blood that control bleeding.
• When a blood vessel is injured, the walls of the blood vessel contract to limit the flow of blood to the damaged area and release chemicals that attract platelets to the area.
• On the surface of these activated platelets, many different clotting factors work together in a series of complex chemical reactions to produce fibrin.
• Thrombin reacts with another protein called fibrinogen to produce fibrin.
• The clot acts like a mesh to stop the bleeding.
• The three main functions of blood for our body are transportation of nutrients and oxygen, heat regulation, and part of the immune system.
• The four components of blood are white blood cells, red blood cells, plasma (bulk/water), and platelets.
• Red blood cells look like red discs, have no nucleus, and are of a similar size.
• White blood cells are small granular fragments, have no nucleus, and vary in size.
• Platelets are large in size, have a well-formed nucleus, and are a component of blood.
• Plasma, also known as bulk/water, is a straw-colored fluid component of blood.
• Red blood cells are made in Bone Marrow.
• Hemoglobin gives red blood cells the ability to carry oxygen.
• The Spleen is an organ that removes dead red blood cells.
• The job of red blood cells in transportation is to carry oxygen.
• A white blood cell's job is to fight viruses, bacteria, and infections.
• Blood is composed of 5% plasma and 45% red blood cells, 1% white blood cells and platelets.
• Platelets are small cell fragments that form clots to prevent bleeding.
• The three main functions of blood for our body are transport, nutrients and oxygen, and part of the immune system.
• The four components of blood are white blood cells, red blood cells, plasma (bulk/water), and platelets.
• Red blood cells look like red discs, have no nucleus, and are of a similar size.
• White blood cells are small granular fragments, have no nucleus, and vary in size.
• Platelets are large in size, have a well-formed nucleus, and are a component of blood.
• Plasma, also known as bulk/water, is a straw-colored fluid component of blood.
• Red blood cells, platelets, and white blood cells are the main components of blood.