Cardiac System

veins- _____ heart

artery-_______ heart

What do the coronary arteries do?

• complete the cycle for the heart to beat

• eject blood from one ventricle to the other

• generates electrical impulse to heart

• draw nutrients from blood to heart through myocardium

what is a myocardial infraction

• chest pain due to decrease in 02 to muscles

• blockage (thrombus) of coronary arteries→decrease O2 to heart→muscle tissues die

• the heart pumping abnormally slower than it should

• the heart pumping abnormally faster than it should

what is angina pectoris

• chest pain due to decrease of O2 to heart

• blockage (thrombus) to coronary arteries→decreased 02 to heart→muscle tissue die

• when the heart is pumping abnormally slow

• when the heart is pumping abnormally fas

The heart beats at an average __ beats/minute.

A complete cycle is about __ seconds.

The systole is when its _______.

The diastole is when its _______.

What is the stroke volume

• The volume of blood ejected from one ventricle with each beat

• amount of blood one ventricle can pump per minute

• the volume of the blood's weight in a ventricle

• the volume of the heart with no blood

Answer explanation

What is the cardiac output

• volume of blood ejected from one ventricle with each beat

• the amount of blood one ventricle can pump each minute

• the volume of blood's weight in the heart

• the weight of the heart with no blood

What is the cardiac output at rest?

• 0.8L/minute

• 5L/minute

• 72L/minute

• 120L/minute

1. Blood fills atriums

2. The __ node is activated (atrium in diastole)

3. __ node is stimulated (atrium now in systole), sending impulse down the _______ of ___

4. Impulse goes down into the ________ fibers, which causes the ventricles to contract

Answer explanation

electrical activity that triggers contraction of the heart

• Depolarization

• Repolarization

• P and T waves

• QRS waves