Cardiovascular System

Valves in the Heart

• Types of blood:

  • Deoxygenated blood from the body

  • Oxygenated blood from the lungs

Path of Blood Through the Heart

1. Blood returns from the body:

   • Superior vena cava

   • Inferior vena cava

2. Enters the Right atrium:

   • Receives deoxygenated blood

3. Passes through the Tricuspid valve:

   • Also known as the right atrioventricular valve

4. Enters the Right ventricle

5. Exits through the Pulmonary valve:

   • Right ventricle to pulmonary artery

6. Travels through the Pulmonary artery to the lungs:

   • Where blood is oxygenated

7. Oxygenated blood returns:

   • Pulmonary veins

8. Enters the Left atrium

9. Passes through the Bicuspid valve (Mitral valve):

   • Also known as the left atrioventricular valve

10. Enters the Left ventricle

11. Exits through the Aortic valve:

12. Enters the Aorta:

    • To distribute oxygenated blood throughout the body

Structures of the Heart

1. Aorta - Main artery delivering oxygenated blood to the body

2. Superior vena cava - Returns deoxygenated blood from the upper body

3. Inferior vena cava - Returns deoxygenated blood from the lower body

4. Right atrium - Chamber receiving deoxygenated blood from the vena cavae

5. Tricuspid valve - Valve controlling blood flow from the right atrium to the right ventricle

6. Right ventricle - Chamber pumping deoxygenated blood to the lungs

7. Pulmonary valve - Valve at the entrance to the pulmonary artery

8. Pulmonary artery - Carries deoxygenated blood to the lungs

9. Left pulmonary veins - Return oxygenated blood from the left lung to the left atrium

10. Left atrium - Chamber receiving oxygenated blood from the lungs

11. Bicuspid (Mitral) valve - Valve controlling blood flow from the left atrium to the left ventricle

12. Left ventricle - Chamber pumping oxygenated blood into the aorta

13. Aortic valve - Valve at the entrance to the aorta

14. Interventricular Septum - Wall dividing the right and left ventricles