Identify the main vessels connected to the heart
Use chamber connections to name vena cava, aorta and the pulmonary vessels.
Core and Extended; Biology 0610, 2026–2028. Use the stated specimen features and evidence. Diagrams are schematic. Written practice is self-checked
Before you begin
- Recall the four heart chambers and double circulation.
Work on paper. Try each question before revealing help, and explain why your method works.
Quick readiness check
Which chamber receives body-return blood?
What you will learn
- Name four connections using their destinations
- Follow endpoints before reading colours
Name four connections using their destinations
The vena cava returns blood from the body to the right atrium. The pulmonary artery carries blood from the right ventricle to the lungs. The pulmonary vein returns blood from the lungs to the left atrium. The aorta carries blood from the left ventricle to the body. The diagram groups upper and lower venae cavae under the required name vena cava.
An artery carries blood away from the heart and a vein carries it towards the heart. Pulmonary vessels are the useful oxygen-content exceptions: the pulmonary artery carries relatively deoxygenated blood and the pulmonary vein carries oxygenated blood in the normal adult model.
Follow endpoints before reading colours
In the original connection diagram, A enters the right atrium from the body, B leaves the right ventricle for lungs, C enters the left atrium from lungs, and D leaves the left ventricle for the body. Each route has a directional arrow. The heart boxes are separated vertically to keep the labels legible; this is a connection map, not anatomical positioning.
Use the receiving or pumping chamber and the other end of the vessel to justify the name. Red and blue are helpful conventions but do not define artery and vein. A grayscale print still supplies sufficient endpoint evidence, and blood in a blue line is not literally blue.
Pause and explain
What are A, B, C and D in the connection map?
Worked example
A route leaves the left ventricle and supplies body organs. Name it and explain why it is an artery.
Show the worked solution
- The systemic output from the left ventricle is the aorta.
- It carries blood away from the heart.
Answer Aorta; its direction is away from the left ventricle towards the body.
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Test this topic →From guided practice to a new situation
Write your answer and reasoning first. Use a hint only if you are stuck. The model solution is for self-checking; your written work is not automatically marked.
Name A and D using their body–heart connections.
Give me a hint
A returns; D supplies.
Compare my reasoning
- A enters the right atrium from body.
- D leaves the left ventricle for body.
A vena cava; D aorta.
Look for these in your work
- Name both
- Use their directions
Name B and C and state their heart chambers.
Give me a hint
B leaves right; C enters left.
Compare my reasoning
- B is the pulmonary artery from right ventricle.
- C is the pulmonary vein into left atrium.
B pulmonary artery: right ventricle → lungs. C pulmonary vein: lungs → left atrium.
Look for these in your work
- Name both pulmonary vessels
- Match both chambers
A grayscale diagram shows a vessel returning from the lungs to the left atrium. Can you identify it without a colour?
Give me a hint
The route is enough.
Compare my reasoning
- It returns towards the heart from the lungs.
- That connection is the pulmonary vein.
Yes: pulmonary vein, identified from the lungs → left atrium route.
Look for these in your work
- Use endpoint evidence
- Do not require colour
Common mistakes
- Connecting the pulmonary vein to the right atrium.
- Defining arteries solely by oxygen content.
What can you explain now?
What are A, B, C and D in the connection map?
Compare with the explanation
Vena cava; pulmonary artery; pulmonary vein; aorta
The endpoints establish all four names.
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Make it stick
Draw and name the four heart connections from memory.
If you needed the solution, close it and solve the problem again from a blank page. A correct answer is stronger when you can explain the reason for each step.