Heart Dissection Worksheet.docx - Heart Dissection Questions ... - Free Printable

Let’s go step by step to label the heart diagram and answer the analysis questions.

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Step 1: Labeling the Heart Diagram

We’ll match each number on the diagram with the correct structure from the word bank. Here’s how we do it:

- 1 → Superior Vena Cava
(This is the large vein at the top right that brings deoxygenated blood from the upper body into the right atrium.)

- 2 → Right Atrium
(The chamber that receives deoxygenated blood from the body via the vena cavae.)

- 3 → Tricuspid Valve
(The valve between the right atrium and right ventricle — it has three flaps.)

- 4 → Right Ventricle
(Pumps deoxygenated blood to the lungs through the pulmonary artery.)

- 5 → Inferior Vena Cava
(Brings deoxygenated blood from the lower body into the right atrium.)

- 6 → Pulmonary Artery
(Carries deoxygenated blood from the right ventricle to the lungs.)

- 7 → Left Atrium
(Receives oxygen-rich blood from the lungs via the pulmonary veins.)

- 8 → Bicuspid Valve (Mitral Valve)
(Valve between left atrium and left ventricle — has two flaps.)

- 9 → Left Ventricle
(Thickest chamber; pumps oxygen-rich blood out to the whole body.)

- 10 → Aorta
(Main artery carrying oxygen-rich blood from the left ventricle to the body.)

- 11 → Pulmonary Veins
(Bring oxygen-rich blood from the lungs to the left atrium — usually shown as multiple small vessels entering the left atrium.)

*(Note: Sometimes diagrams show 4 pulmonary veins, but they’re often grouped under one label.)*

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Step 2: Answering Analysis Questions

Question 1:
*In general, which side of the heart is the ventral surface (the side closest to the sternum)?*

→ The right side of the heart is closer to the front of the chest (sternum). When you look at a person standing, their right side of the heart faces forward more than the left. So, the right side is the ventral surface.

Question 2:
*The right side of the heart is the part of the heart that faces your chest when you are looking at a person. How can you tell the difference between the right and left sides of the heart?*

→ You can tell by looking at the thickness of the walls. The left ventricle has much thicker muscle because it pumps blood to the entire body. The right ventricle is thinner because it only pumps blood to the nearby lungs. Also, the aorta comes off the left side, and the pulmonary artery comes off the right side.

Question 3:
*How many chambers are found in the mammalian heart? List these chambers.*

→ There are four chambers:
1. Right Atrium
2. Right Ventricle
3. Left Atrium
4. Left Ventricle

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Final Answer:

Diagram Labels:
1. Superior Vena Cava
2. Right Atrium
3. Tricuspid Valve
4. Right Ventricle
5. Inferior Vena Cava
6. Pulmonary Artery
7. Left Atrium
8. Bicuspid Valve
9. Left Ventricle
10. Aorta
11. Pulmonary Veins

Analysis Answers:
1. The right side of the heart is the ventral surface (closest to the sternum).
2. You can tell the difference by wall thickness (left ventricle is thicker) and which major vessel connects to each side (aorta = left, pulmonary artery = right).
3. Four chambers: Right Atrium, Right Ventricle, Left Atrium, Left Ventricle.