By: Kimanh Nguyen

The heart is a muscular organ that pumps blood. It is involved in two types of circulation: systematic circulation and pulmonary circulation.



external image 0136A.gif


It is composed of:
  1. Myocardium
  2. Coronary arteries
  3. Coronary veins
  4. Septum
  5. Superior vena cava
  6. Inferior vena cava
  7. Right atrium
  8. Tricuspid valve
  9. Right ventricle
  10. Pulmonary valve
  11. Pulmonary artery
  12. Pulmonary veins
  13. Left atrium
  14. Mitral valve
  15. Left ventricle
  16. Aortic valve
  17. Capillaries

Structures/Functions:
v Myocardium
  • Ø Muscular tissue of the heart
v Coronary arteries
  • Ø Supplies blood to the heart muscle
v Coronary veins
  • Ø Drain blood from the heart wall and empty into the coronary sinus
v Septum
  • Ø A partition that separates two chambers of the heart
v Superior vena cava
  • Ø Receives blood from the head/ arms/ chest and empties into the right atrium of the heart
v Inferior vena cava
  • Ø Receives blood from lower limbs/ abdominal organs and empties into the posterior part of the right atrium of the heart
v Right atrium
  • Ø Right upper chamber of the heart
  • Ø Receives blood from the vena cava
v Tricuspid valve
  • Ø Has 3 cusps
  • Ø Located between the right atrium and the right ventricle
  • Ø Allows blood to pass from atrium to ventricle
  • Ø Prevents backflow when the ventricle contracts
v Right ventricle
  • Ø Chamber located on t he right side of the heart
  • Ø Receives venous blood from the right atrium
  • Ø Pumps the blood into the pulmonary trunk
v Pulmonary valve
  • Ø Located between the right ventricle and the pulmonary artery
  • Ø Prevents blood from flowing from the artery back into the heart
v Pulmonary artery
  • Ø Carries blood from the right ventricle of the heart to the lungs for oxygenation
v Pulmonary vein
  • Ø Carries oxygenated blood from the lungs to the left atrium of the heart
v Left atrium
  • Ø The left upper chamber of the heart
  • Ø Receives blood from the pulmonary veins
v Mitral valve
  • Ø Located between the left atrium and the left ventricle of the heart
  • Ø Composed of 2 cusps
v Left ventricle
  • Ø located on the left side of the heart
  • Ø receives arterial blood from the left atrium
  • Ø pumps the blood into the aorta
v Capillaries
  • Ø Network of blood vessels located between the arterioles and venues