Cardiac And Respiratory systems

Question 1

Explain the three stages of a heart beat

Answer 1

Stage one: cardiac diastole
The chambers of the heart are relaxed and filling passively
Stage 2: atrial systole
The atria contract, pumping blood into the ventricles
Stage 3: ventricular systole
The left ventricle contracts, driving blood out of the heart and throughout the body via both the pulmonary artery and the aorta

Question 2

What is cardiac output?

Answer 2

The amount of blood that is pumped by the heart per minute

Question 3

What is stroke volume?

Answer 3

The amount of blood pumped by the heart per minute

Question 4

What is heart rate?

Answer 4

The number of beats per minute

Question 5

What is a normal resting heart rate for adults?

Answer 5

60-100 beats per minute