Blood Flow of the Heart Lecture Notes

Overview

• Instructor: Sarah from RegisteredNurseRN.com
• Topic: Blood flow of the heart
• Additional Resource: Access a free quiz on heart blood flow after watching the video.

Key Concepts

• The heart is divided into two sides:
  • Right Side: Manages unoxygenated blood, sending it to the lungs for oxygenation.
  • Left Side: Handles oxygenated blood, sending it throughout the body.

Structure of the Heart

• Each side has six structures through which blood flows.

Blood Flow Process

Right Side of the Heart

1. Blood Entry Points:
   • Superior vena cava
   • Inferior vena cava
2. Right Atrium:
   • Receives unoxygenated blood.
3. Tricuspid Valve:
   • Separates the right atrium from the right ventricle.
   • Mnemonic: "Try before you buy" (Tricuspid before Bicuspid)
4. Right Ventricle:
   • Pumps blood to the lungs.
5. Pulmonic Valve:
   • Blood passes through this valve.
6. Pulmonary Artery:
   • Carries blood to the lungs.
   • Function: Gas exchange occurs in alveoli sacs; oxygen is absorbed, and carbon dioxide is expelled.

Left Side of the Heart

1. Pulmonary Vein:
   • Carries oxygenated blood from the lungs to the heart.
2. Left Atrium:
   • Receives oxygenated blood.
3. Bicuspid (Mitral) Valve:
   • Separates left atrium from the left ventricle.
4. Left Ventricle:
   • Pumps oxygenated blood into the aorta.
5. Aortic Valve:
   • Blood passes through this to reach the aorta.
6. Aorta:
   • Distributes oxygenated blood to organs and tissues.

Conclusion

• Recap: Right side sends unoxygenated blood to the lungs, left side sends oxygenated blood to the body.
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