Heart in amphibians pumps

Options

A. oxygenated blood
B. deoxygenated blood
C. mixed blood
D. both (1) & (2)

Answer

To answer the question "Heart in amphibians pumps," we need to analyze the structure and function of the amphibian heart. Here’s a step-by-step breakdown of the solution:

### Step-by-Step Solution:

1. **Understanding Amphibian Heart Structure**:
- Amphibians have a three-chambered heart, which consists of two atria and one ventricle. This unique structure is essential for their circulatory system.

2. **Circulatory Routes**:
- Amphibians have two circulatory routes:
- One route is responsible for oxygenating the blood through the lungs and skin.
- The other route is for distributing oxygenated blood to the rest of the body.

3. **Types of Blood**:
- The heart pumps both oxygenated and deoxygenated blood. However, due to the mixing of blood in the single ventricle, the blood that is pumped out is a mixture of both types.

4. **Analyzing the Options**:
- **Option A: Oxygenated Blood** - This refers to blood rich in oxygen, but in amphibians, the heart does not pump only oxygenated blood due to the mixing in the ventricle.
- **Option B: Deoxygenated Blood** - This refers to blood low in oxygen and high in carbon dioxide. While the heart does pump deoxygenated blood, it is not the only type of blood being pumped.
- **Option C: Mixed Blood** - This option indicates that the heart pumps a combination of oxygenated and deoxygenated blood, which accurately reflects the function of the amphibian heart.
- **Option D: Both One and Two** - This option suggests that the heart pumps both oxygenated and deoxygenated blood, which is true but does not capture the mixing aspect.

5. **Conclusion**:
- The most accurate answer is **Option C: Mixed Blood**, as the amphibian heart pumps a mixture of oxygenated and deoxygenated blood due to the structure of the three-chambered heart.

### Final Answer:
The heart in amphibians pumps **mixed blood**.