circulatory system
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What is special about the pulmonary artery?
It is the only artery that carries deoxygenated blood.
What is special about the pulmonary vein?
It is the only vein that carries oxygenated blood.
List 6 functions of the circulatory system.
Brings nutrients to cells, removes waste, transports hormones, distributes heat, maintains fluid levels, fights infection.
What percentage of blood is plasma?
55%.
What does plasma do?
It’s a pale yellow liquid that carries cells and dissolved particles.
What is the function of red blood cells (RBCs)?
Transport oxygen using hemoglobin.
What gives red blood cells their red colour?
Iron in hemoglobin.
What is the function of platelets?
Help blood clot.
What is the function of white blood cells (WBCs)?
Fight infection.
What are antigens?
Something foreign that enters your body and makes your immune system react
What are antibodies?
Proteins in blood that attack foreign antigens.
What happens when the wrong blood type is mixed together?
Agglutination (dangerous clumping).
What does Rh factor determine?
Whether blood is positive (+) or negative (–).
What can high blood pressure cause?
Stroke, heart attack, heart failure, kidney failure.
What is an ischemic stroke?
A stroke caused by a blood clot blocking a vessel in the brain.
What is a hemorrhagic stroke?
A stroke caused by a blood vessel bursting in the brain.
What causes a heart attack?
Blood flow to the heart is blocked by plaque buildup, causing heart tissue to die.