BLOOD pp 940 942 BLOOD FACTS The average

BLOOD pp 940 -942

BLOOD FACTS • The average adult has about FIVE liters of blood inside of their body, which makes up 7 -8% of their body weight. • There about one billion red blood cells in two to three drops of blood. • For every 600 red blood cells, there about 40 platelets and one white cell.

FUNCTION Transports nutrients, O 2, CO 2, & waste Defends the body against disease

COMPOSITION plasma: liquid medium red blood cells (erythrocytes): transport CO 2 and O 2 gas For every 600 red blood cells, there about 40 platelets and one white blood cell.

COMPOSITION white blood cells (leukocytes): defend against disease platelets: form blood clots For every 600 red blood cells, there about 40 platelets and one white blood cell.

PLASMA Made of 90% water, sugar, salts, amino acids, vitamins, minerals

RED BLOOD CELLS Most common in the blood Made of iron-containing hemoglobin (O 2 binds here) Lack of nucleus leaves space to transport materials

RED BLOOD CELLS Transports O 2 to cells in body and picks up CO 2 waste Average lifespan 100 – 120 days

WHITE BLOOD CELLS Many types of white blood cells Fight pathogens

PLATELETS Partial cells formed in bone marrow Stimulate blood clotting Steps to blood clotting Platelets congregate at damaged site 2. Clotting factors are released from platelets 3. Factors create chemical reaction that releases fibrin (long, stick, protein chain) 4. Creates Clot (net traps red blood cells and hardens to create a scab) 1.