08 - Function Of The CV System Flashcards
What is the function of the right side of the heart?
To receive blood returning from the body
To pump blood to the lungs for gas exchange
What are the functions of the left side of the heart?
Receive oxygenated blood from lungs
Pump blood into systemic circulation
Where is the CV control centre located in the brain?
In the medulla oblongatta
What does the medulla oblongata do?
Coordinates the homeostatic response of the heart output
When do ventricles contract?
During systole, this means that blood flows out
Systole means pump
When do ventricles relax?
During diastole, when the blood flows into them from the atria above
(Diastole means relax)
What is the intrinsic rhythm from the sinoatrial node?
Approx 100bpm
What is the average HR at rest?
60-70 bpm
What is a resting heart rate above 100 bpm called?
Tachycardia
What is a resting HR below 60 bpm called?
Bradycardia
What does the P wave on a ECG associated with?
Artial contraction
What is the QRS wave on an ECG associated with?
Ventricular contraction
What is the T wave on a ECG associated with?
Ventricular relaxation
