Blood flow
What is the biggest artery and vein?
aorta and vena cava
What is Cardiac conduction?
where the nervous system tells the heart what to do
What is systole?
closure of the AV valves when the ventricles contract. the "lub" sound
What is the cardiovascular system designed for?
Transportation and communication throughout the body
What are the valves made up of?
chordae tendinae
What is the valve that separates the right atrium and right ventricle?
Tricuspid valve
What does the SA node do?
acts as a pacemaker for the heart
What is diastole?
the closure of valves when the ventricles relax. the "dub" sound
What is the pericardium?
The sac that surrounds and protects the heart
What is coronary artery disease?
blockage due to plaque which then causes a heart attack
What artery carries deoxygenated blood?
Pulmonary artery
What does the AV node do?
tells the atria to contract
What are the three abnormal heart sounds
gallops, rubs, murmurs
What are the three layers of the heart wall?
Endocardium, Myocardium, Epicardium
What are the three factors that regulate BP?
Plaque build up, hormones, kidney function
What are the semilunar valves?
The pulmonic and aortic valve
What does the bundle of his do?
slows down signal so the ventricles fill
what is happening when you hear "rubbing"
the pericardium rubs against the heart
What is ischemia?
reversible cell injury due to decreased blood and oxygen supply
What are some effects of aging on your heart?
Heart can swell, can't absorb oxygen, valves can harden
Where are the coronary arteries located?
What does the purkinje fibers do?
it's for the ventricles to contract
What is happening when you hear murmurs?
The valves aren't closing all the way, Regurgitation occurs.
What are the tissue layers and what are they composed of?
1. Tunica adventitia- nerve cells
2. Tunica media- connective tissue and muscle
3. Tunica intima- connective tissue
What is Cardiac arrest?
disruption to the electrical signal