circulatory system Flashcards
What structure of the artery causes it to constrict
Muscle
what is warfrin
an anticoagualant that prevents blood from clotting dosage needs to be controlled as too much can lead to uncontrolled bleeding
Explain the structure of a capillary
1 layer of endothelium
What structure of blood vessels is in contact with blood
Endothellium
What’s the structural difference between arteries and arterioles
Arterioles have thinner muscle and elastic layer
what do statins do
reduce blood cholesterol levels by blocking an enzyme that makes cholesterol in the liver side effects include inflamation and constipation
What do valves do
Ensure that low blood pressure only flows in the right direction
Why is the human heart called a double circulatory system
Two circuits going away from the heart
What do the coronary arteries do
Supply the heart muscle with nutrients and oxygen
What do the cardiac veins do
Remove cellular wastes from the heart
Which side of the heart carries deoxygenated blood
Right side
Which side of the heart carries oxygenated blood
Left side
what are platelet inhibitors
platelet inhibitors make platelets less sticky reducing the risk of blood clots. asprin is a platelet inhibitor but can cause stomach bleeding and irritation to the stomach lining
where does blood enter into
artia
what chamber does blood leave from
ventricles
Why do ventricles have thicker walls than atria
because they have to push blood further around the body
what are beta blockers
reduce the hearts contraction by blocking the responce of the heart to hormones but can increase the risk of diabetes
What is the function of the pulmonary veins
where oxygenated blood flows from the lungs to the left atrium
What is the function of the aorta
where oxygenated blood flows from the left ventricle to the body
What is the function of valves
to make sure blood flow is unidirectional
one direction
always include unidirectional. if not redo
What is the function of the hearts septum
to prevent doxygenated and oxygenated blood from mixing in the heart
What is the function of the vena cava
carries deoxygenated blood from the body to the heart
What is the function of the coronary artery
to supply the heart muscle with oxygenated blood
When do valves open
when pressure behind them is higher than pressure below
