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Transcript
Blood Blood There are about 5 liters of blood circulating within the average adult human body; the body can replace blood loss within 24 hours. Functions of the Blood Sends life-sustaining nutrients, O2, and hormones to all parts of the body. Removes waste products to prevent toxic buildup. Helps keep fluid volume within body tissues stable and helps regulate body temperature. Liquid & Cellular Components Plasma - (55% of the blood volume) consists of: H2O Proteins Salts Nutrients Vitamins Hormones Liquid & Cellular Components WBC’s (White Blood Cells, Leukocytes) - protect against disease and help fight infection Granular Neutrophils - remove unwanted particles and materials from the blood Eosinophils - kill parasites, help control inflammation and allergic reactions Basophils - release heparin to stop clotting, produce histamine to cause the blood vessels to dilate, help control inflammation, and kill parasites Liquid & Cellular Components WBC’s (White Blood Cells, Leukocytes) - protect against disease and help fight infection Agranular or Nongranular Monocytes - destroy large unwanted particles in the bloodstream Lymphocytes - essential to the immune system and protect the body against the formation of cancer cells Liquid & Cellular Components Platelets (Thrombocytes) - live for about ten days and are essential for blood clotting RBC’s (Red Blood Cells, Erythrocytes) Hematocrit (Hct) - measurement of the percentage of PRBC’s RBC’s are produced in the bone marrow and circulate in the body for about 120 days Hemoglobin - a protein within the RBC and transports O2 to the cells in the body Human Blood Types A B AB - Universal Recipient O - Universal Donor Human Blood Types In addition to the four blood types, there is a positive and negative component in the blood, known as the Rh factor. Rh+ (positive) blood contains this factor, and Rh- (negative) blood does not. The Rh factor is a type of antigen, or substance that causes the body to produce antibodies.