4+WB

“Lub” “Dub” sound: - “Lub”: o Aortic valve closing - “Dub”: o Semilunar valves closing

Heartbeat: - Kept regular by sinoatrial node

Pulse: - Indicates heart rate

Blood flow: - Blood pressure affects blood flow - Flow comes from skeletal muscle

Blood Blood function: - Transports oxygen from the lungs - Moves nutrients from foods to the body - Keeps a steady, constant body temperature

Plasma: - Composition: o 9% organic molecules o 91% h2o - Function: o Maintain blood pH level

Oxygen: - Moved by red blood cells through hemoglobin

Red blood cells: - Shape: o Biconcave, or ovular - Illnesses: o Anemia o Hemolysis o Sickle-cell

Blood types: - Types: o A o B o AB o O - Donation: o O is the universal donor blood, because it does not harmfully interfere with any other blood type

Hemolytic disease: - A mother has Rh- blood, but child has Rh+ blood