❤️

• Located in the mediastinum

• Protected by the sternum

• Beats 100,000 times a day

• Pumps 7,000- 9,000 liters of blood everyday

3 Layers

• Epicardium: Outer layer

• Myocardium: middle muscular layer

• Endocardium: inner layer

• Pericardium: sac that surrounds

• Right side of the ❤ : pump’s deoxygenated blood

• Left side of the ❤: pumps oxygenated blood

The heart has 4 chambers:

• Atria: upper chambers

• Ventricles: lower chambers

• Septum: wall that separates R+L atrium, R+L ventricle

The heart has 4 valves:

1: Tricuspid: Located between (R) Atrium