1. The Mammalian Heart
By Idura Namira

2. Learning Objectives

3. The heart

4. Thickness of Chambers Side Thickness Left Atrium
Thin walls, only need to pump to ventricles.
Left Ventricle
Has the thickest muscle and it has to induce enough pressure to pump the blood throughout the whole body.
Right Atrium
Thin walls only need to pump to ventricles.
Right Ventricle
Has thinner muscle compare to the left ventricle as it only has to pump blood to the lungs.

5. Stages of The Cardiac Cycle

6. The cardiac cycle

7. Control of The Heartbeat

8. Electrocardiograms
The part labelled P represents the wave of excitation sweeping over the atrial walls. The parts labelled Q, R and S represent the wave of excitation in the ventricle walls. The T section indicates the recovery of the ventricle walls.