Medical Surgical Cardiac Fundamentals #1

Question

Which order best explains the blood flow through the heart if a person was following a drop of blood through the heart?

Answers

  1. Vena cava, right atrium, right ventricle, left atrium, left ventricle, lungs, aorta to the body
    • Rationale:

      This answer is not correct because the blood does not go directly from the right ventricle to the left atrium. The correct flow of blood is demonstrated by this order: Vena cava, right atrium, right ventricle, lungs, left atrium, left ventricle, aorta, to the body. A proper understanding of the flow of blood through the heart is foundational to understanding the heart and conditions which affect the heart.

  2. Vena cava, left atrium, left ventricle, lungs, right atrium, right ventricle, aorta, to the body
    • Rationale:

      This answer is not correct because the blood does not proceed through the heart from the vena cava to the left atrium, instead it goes from the vena cava to the right atrium. The correct flow of blood is demonstrated by this order: Vena cava, right atrium, right ventricle, lungs, left atrium, left ventricle, aorta, to the body. A proper understanding of the flow of blood through the heart is foundational to understanding the heart and conditions which affect the heart.

  3. Vena cava, right atrium, left atrium, lungs, right ventricle, left ventricle, aorta, to the body
    • Rationale:

      This answer is not correct because the blood does not flow from the right atrium to the left atrium or the right ventricle to the left ventricle. The correct flow of blood is demonstrated by this order: Vena cava, right atrium, right ventricle, lungs, left atrium, left ventricle, aorta, to the body. A proper understanding of the flow of blood through the heart is foundational to understanding the heart and conditions which affect the heart.

  4. Vena cava, right atrium, right ventricle, lungs, left atrium, left ventricle, aorta, to the body
    • Rationale:

      This answer is correct because the correct flow of blood is demonstrated by this order: Vena cava, right atrium, right ventricle, lungs, left atrium, left ventricle, aorta, to the body. A proper understanding of the flow of blood through the heart is foundational to understanding the heart and conditions which affect the heart.

Overview

The flow of blood through the heart is properly explained in this order: Vena cava, right atrium, right ventricle, lungs, left atrium, left ventricle, aorta, to the body

Explanation

Learning Outcomes

A proper understanding of the flow of blood through the heart is foundational to understanding the heart and conditions which affect the heart. The flow of blood through the heart is properly explained in this order: Vena cava, right atrium, right ventricle, lungs, left atrium, left ventricle, aorta, to the body. There are valves that blood goes through as it enters certain areas of the heart. If they are added, the flow of one drop of blood through the heart is in this order: Vena cava, right atrium, tricuspid valve, right ventricle, pulmonic valve, lungs, left atrium, mitral valve, left ventricle, aortic valve, aorta, to the body. The electrical system flows in this order: Sinoatrial (SA) node, atrioventricular (AV) node, Bundle of His, right and left bundle branches, Purkinje fibers. Understanding this flow is imperative to understanding the fundamentals of the heart.

Test Taking Tip

Remember ā€œAā€ comes before ā€œVā€ (atrium comes before ventricle). Also, it is always right to start right (right atrium, right ventricles before the left atrium before the left ventricles).

Video Rationale