Which of the following parts of the human heart contains deoxygenated blood only?Only one correct answerA.Vena cavaB.Left atriumC.Left ventricleD.Aorta

Step 1: Break Down the Problem

To determine which part of the human heart contains deoxygenated blood only, we need to analyze the function of each of the given options:

1. Vena cava
2. Left atrium
3. Left ventricle
4. Aorta

Step 2: Relevant Concepts

Understanding the role of each part of the heart in circulation helps us classify the type of blood each contains:

• The vena cava carries deoxygenated blood from the body to the right atrium.
• The left atrium receives oxygenated blood from the lungs.
• The left ventricle pumps oxygenated blood to the body.
• The aorta carries oxygenated blood away from the heart to the body.

Step 3: Analysis and Detail

1. Vena cava:

   • It includes the superior and inferior vena cava.
   • Function: Transports deoxygenated blood to the right atrium.

2. Left atrium:

   • It receives blood from the pulmonary veins.
   • Function: Collects oxygenated blood from the lungs.

3. Left ventricle:

   • It pumps blood into the aorta.
   • Function: Distributes oxygenated blood throughout the body.

4. Aorta:

   • The largest artery in the body.
   • Function: Carries oxygenated blood from the left ventricle to the body.

Step 4: Verify and Summarize

The only part of the list that contains deoxygenated blood exclusively is the vena cava, as the other options (left atrium, left ventricle, and aorta) contain oxygenated blood.

Final Answer

The correct answer is A. Vena cava.