Cardiovascular System Blood Instructor - Cindy Quisenberry
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 build- up. 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.