Use the model of circulation in the leg of a Canada goose to answer the following question. Canada goose Artery 0 0 Vein 35°C 30 27 20 18 10 99 To From foot foot Which of the following is the best interpretation of the model? that arterial blood is always cooler in the abdomen, compared to the temperature of the venous blood in the feet of the goose O that warmer arterial blood can bypass the legs as needed, when the legs are too cold to function well O that warmer arterial blood transfers heat to the cooler venous blood that warmer venous blood transfers heat to the cooler arterial blood 1111111

Human Anatomy & Physiology (11th Edition)
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Author:Elaine N. Marieb, Katja N. Hoehn
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Chapter1: The Human Body: An Orientation
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**Title: Understanding the Circulation in the Leg of a Canada Goose**

**Diagram Explanation:**

The diagram presents a model of circulation in the leg of a Canada goose. It shows the temperature gradients between the artery and vein in the goose's leg.

- **Canada Goose**: An image of the bird is shown above the diagram.
  
- **Circulatory Pathway**:
  - The artery and vein run parallel to each other in the leg.
  - Temperature points are marked along the leg:
    - At the top: Artery temperature is 35°C, Vein temperature is 33°C.
    - Lower points show a gradual decrease in temperature as follows:
      - 30°C and 27°C
      - 20°C and 18°C
      - 10°C and 9°C
  - Arrows indicate the direction of blood flow:
    - Arterial blood flows "to foot."
    - Venous blood returns "from foot."

**Question:**

*Which of the following is the best interpretation of the model?*

- [ ] Arterial blood is always cooler in the abdomen compared to the temperature of the venous blood in the feet of the goose.
- [ ] Warmer arterial blood can bypass the legs as needed, when the legs are too cold to function well.
- [x] Warmer arterial blood transfers heat to the cooler venous blood.
- [ ] Warmer venous blood transfers heat to the cooler arterial blood.

**Conclusion:**

This model illustrates the counter-current heat exchange system in the legs of a Canada goose, where the warmer arterial blood transfers heat to the cooler venous blood, helping to conserve heat in cold environments.
Transcribed Image Text:**Title: Understanding the Circulation in the Leg of a Canada Goose** **Diagram Explanation:** The diagram presents a model of circulation in the leg of a Canada goose. It shows the temperature gradients between the artery and vein in the goose's leg. - **Canada Goose**: An image of the bird is shown above the diagram. - **Circulatory Pathway**: - The artery and vein run parallel to each other in the leg. - Temperature points are marked along the leg: - At the top: Artery temperature is 35°C, Vein temperature is 33°C. - Lower points show a gradual decrease in temperature as follows: - 30°C and 27°C - 20°C and 18°C - 10°C and 9°C - Arrows indicate the direction of blood flow: - Arterial blood flows "to foot." - Venous blood returns "from foot." **Question:** *Which of the following is the best interpretation of the model?* - [ ] Arterial blood is always cooler in the abdomen compared to the temperature of the venous blood in the feet of the goose. - [ ] Warmer arterial blood can bypass the legs as needed, when the legs are too cold to function well. - [x] Warmer arterial blood transfers heat to the cooler venous blood. - [ ] Warmer venous blood transfers heat to the cooler arterial blood. **Conclusion:** This model illustrates the counter-current heat exchange system in the legs of a Canada goose, where the warmer arterial blood transfers heat to the cooler venous blood, helping to conserve heat in cold environments.
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