A Level Biology: Worksheet Pack on Heart Structure and the Cardiac ... - Free Printable

Problem Analysis:

The task involves labeling the external and internal structures of the heart, shading the diagram to represent oxygenated and deoxygenated blood, and drawing arrows to show the flow of blood through both sides of the heart. Below is a detailed explanation and solution for each part.

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Step 1: Labeling the External Structure of the Heart (Diagram 1)

The external structure of the heart includes major vessels and parts of the heart visible from the outside. Here are the labels for the numbered parts:

1. Pulmonary Artery: The vessel that carries deoxygenated blood from the right ventricle to the lungs.
2. Aorta: The main artery that carries oxygenated blood from the left ventricle to the body.
3. Superior Vena Cava: A large vein that returns deoxygenated blood from the upper body to the right atrium.
4. Inferior Vena Cava: A large vein that returns deoxygenated blood from the lower body to the right atrium.
5. Right Auricle (Part of Right Atrium): The upper chamber on the right side of the heart.
6. Left Auricle (Part of Left Atrium): The upper chamber on the left side of the heart.

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Step 2: Labeling the Internal Structure of the Heart (Diagram 2)

The internal structure of the heart includes chambers, valves, and other key components. Here are the labels for the numbered parts:

1. Pulmonary Artery: Carries deoxygenated blood from the right ventricle to the lungs.
2. Aorta: Carries oxygenated blood from the left ventricle to the body.
3. Right Atrium: Receives deoxygenated blood from the body via the superior and inferior vena cava.
4. Left Atrium: Receives oxygenated blood from the lungs via the pulmonary veins.
5. Right Ventricle: Pumps deoxygenated blood into the pulmonary artery.
6. Left Ventricle: Pumps oxygenated blood into the aorta.
7. Tricuspid Valve: Located between the right atrium and right ventricle, preventing backflow of blood.
8. Bicuspid (Mitral) Valve: Located between the left atrium and left ventricle, preventing backflow of blood.
9. Pulmonary Veins: Carry oxygenated blood from the lungs to the left atrium.

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Step 3: Shading the Diagram to Represent Blood Oxygenation

- Deoxygenated Blood (Blue): This blood is present on the right side of the heart, including the right atrium, right ventricle, and pulmonary artery.
- Oxygenated Blood (Red): This blood is present on the left side of the heart, including the left atrium, left ventricle, and aorta.

Shade:
- The right atrium, right ventricle, and pulmonary artery in blue.
- The left atrium, left ventricle, and aorta in red.

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Step 4: Drawing Arrows to Show Blood Flow

The flow of blood through the heart can be summarized as follows:

#### Right Side (Deoxygenated Blood Pathway):
1. Deoxygenated blood enters the right atrium from the body via the superior and inferior vena cava.
2. Blood flows from the right atrium through the tricuspid valve into the right ventricle.
3. The right ventricle pumps blood through the pulmonary artery to the lungs for oxygenation.

#### Left Side (Oxygenated Blood Pathway):
1. Oxygenated blood returns to the left atrium from the lungs via the pulmonary veins.
2. Blood flows from the left atrium through the bicuspid (mitral) valve into the left ventricle.
3. The left ventricle pumps blood through the aorta to the body.

Draw arrows to represent this flow:
- From the superior and inferior vena cava into the right atrium.
- From the right atrium through the tricuspid valve into the right ventricle.
- From the right ventricle into the pulmonary artery.
- From the pulmonary veins into the left atrium.
- From the left atrium through the bicuspid valve into the left ventricle.
- From the left ventricle into the aorta.

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Final Answer:

- External Structure Labels:
1. Pulmonary Artery
2. Aorta
3. Superior Vena Cava
4. Inferior Vena Cava
5. Right Auricle (Part of Right Atrium)
6. Left Auricle (Part of Left Atrium)

- Internal Structure Labels:
1. Pulmonary Artery
2. Aorta
3. Right Atrium
4. Left Atrium
5. Right Ventricle
6. Left Ventricle
7. Tricuspid Valve
8. Bicuspid (Mitral) Valve
9. Pulmonary Veins

- Shading:
- Right side (deoxygenated): Blue
- Left side (oxygenated): Red

- Arrows:
- Follow the described flow paths for deoxygenated and oxygenated blood.

Final Answer Boxed:
\[
\boxed{
\text{See detailed explanations above for labels, shading, and arrow directions.}
}
\]