Activity 1 Unit 8 Lesson 8:

Question

Step 1: Label a Heart
Using an image of an anatomically correct heart found through an internet search, stock footage, or that you create by hand, do the following:

Draw and label all of the structures you learned about in Unit 8.
It will be up to you to determine which labels to use for each section.

Use straight lines pointing to your label or use a numbering system to identify the labeled areas.

Use arrows to demonstrate the direction in which blood flows through pulmonary and systemic circulation.

Distinguish between pulmonary and systemic circulation in some way (such as two different colors).

Draw and label the conductivity as it passes through the heart using directional arrows and a labeling system of your choosing.

Answer 1

Here's a step-by-step guide to help you create an anatomically correct heart diagram with all the required elements for your activity:

Step 1: Gather Materials

• Image Source: Search online for a clear, anatomically correct image of the human heart or draw one by hand.
• Tools: Use colored pens or markers if you're drawing by hand, or graphic editing software if you're working digitally.

Step 2: Draw and Label the Heart Structures

1. Identify Key Structures: Based on your learning, make sure to include the following:

   • Right Atrium
   • Right Ventricle
   • Left Atrium
   • Left Ventricle
   • Aorta
   • Pulmonary Arteries
   • Pulmonary Veins
   • Superior Vena Cava
   • Inferior Vena Cava
   • Septum (Interventricular Septum)
   • Valves (Tricuspid Valve, Pulmonary Valve, Mitral Valve, Aortic Valve)

2. Label Each Structure: Position your labels near each structure. You can use:

   • Straight lines with arrows pointing to the name
   • A numbered system (1, 2, 3...) with a corresponding list on the side explaining each number.

Step 3: Indicate Blood Flow Directions

• Use Arrows: Draw arrows to show the direction of blood flow:
  • From the body (via the Superior and Inferior Vena Cava) into the Right Atrium → Right Ventricle → Pulmonary Arteries → Lungs (for oxygenation).
  • From the lungs (via Pulmonary Veins) into the Left Atrium → Left Ventricle → Aorta → Out to the body.

Step 4: Distinguish Between Circulations

• Color Coding:
  • Use one color (e.g., blue) to indicate pulmonary circulation (right side of the heart to lungs and back).
  • Use another color (e.g., red) for systemic circulation (left side of the heart to the body).

Step 5: Label the Conductivity Pathway

• Electrical Conductivity Pathway: Show the pathway of electrical signals that control heartbeats:

  • Sinoatrial Node (SA Node) – starts the electrical impulse.
  • Atrioventricular Node (AV Node) – relays signals to the ventricles.
  • Bundle of His – conducts impulses to the ventricles.
  • Purkinje Fibers – spread signals throughout the ventricles.

• Use directional arrows to illustrate this pathway, labeling each part appropriately.

Step 6: Final Touches

• Review your diagram to ensure all parts are accurately labeled and indicated.
• Make sure to check for clarity and completeness.

Example Labeling System:

• 1. Right Atrium
• 2. Right Ventricle
• 3. Left Atrium
• 4. Left Ventricle
• 5. Aorta
• 6. Pulmonary Arteries
• 7. Pulmonary Veins
• 8. Superior Vena Cava
• 9. Inferior Vena Cava
• 10. Tricuspid Valve
• 11. Mitral Valve
• 12. Septum

Additional Notes:

• Ensure your diagram is neat and legible.
• If you present it digitally, consider adding a title or a brief description of your diagram's purpose (e.g., "Anatomy of the Human Heart and Circulatory Pathways").

This comprehensive approach will enable you to create an informative and visually engaging heart diagram that meets your assignment requirements.