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Primary functions of the Circulatory System
-Transport materials around the body
-Remove waste from the body
-Allows for white blood cells and platelets to travel through the body
-Distributes Heat
What is your pulse?
The expansion of your arteries as your ventricles contract
Where does your heartbeat come from?
comes from valves opening and closing
What is blood pressure?
The force of blood on the wall of the vessels
Be able to identify the structure and function of all 3 vessels
Arteries, Capillaries, Veins
What is a normal blood pressure for an adult?
120/80
What is the function of each type of vessel?
arteries--> away format he heart
viens--> to the heart
capillaries--> where the direction of flow switches
--> site of gas + nutrient exchange
What is hypertension?
-Consistently high blood pressure
-makes the heart work harder
-damage blood vessels--> atherosclerosis(heart attack or stroke)
-Damage organs
Valves in veins - What do they do?
one way passage preventing backflow
What happens if you have low blood pressure?
-dizziness
-fainting
-blurred vision
-rapid or irregular heartbeats
-nausea
-general weakness