1. Cardiovascular System
Blood
Instructor - Cindy Quisenberry

2. Blood
There are about 5 liters of blood circulating within the average adult human body; the body can replace blood loss within 24 hours.

3. 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.

4. Liquid & Cellular Components
Plasma - (55% of the blood volume) consists of:
H2O
Proteins
Salts
Nutrients
Vitamins
Hormones

6. 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

7. 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

8. 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

10. Human Blood Types A B
AB - Universal Recipient
O - Universal Donor

11. 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.