Anatomy of the Heart

1
Anatomy of the Heart

• Epicardium thin outer connective layer where
  coronary vessels travel through (Fat)
• Endocardium thin connective layer that lines the
  interior of the heart (no fat)
• Myocardium thick middle muscle layer that
  performs the work of the heart
• Fibrous skeleton support and anchor

2
Chambers

• R atria thin myocardium, receives blood from the
  three great veins
• L atria thin myocardium, receives blood from
  pulmonary veins
• R ventricle thicker myocardium, receives from
  tricuspid, pushes to pulmonary arteries
• L ventricle thickest myocardium, receives from
  bicuspid, pushes to rest of body
• Chambers divided by septum's

3
Valves

• Valves ensure one-way flow
• Each valve is made of two to three fibrous flaps
  called cusps
• Chordae tendineae fibrous strings that attach to
  cusps and papillary muscles of ventricles to
  reduce bulging
• Semilunar valves each has three flaps regulated
  by pressure differences