Heart of mammal is

Options

A. Two chambered
B. Three chambered
C. Four chambered
D. One chambered .

Answer

**Step-by-Step Solution:**

1. **Understanding the Structure of the Heart:**
- The heart is a vital organ responsible for pumping blood throughout the body. It consists of chambers that can vary in number depending on the type of animal.

2. **Identifying Heart Types in Different Animals:**
- Fish have a two-chambered heart, which consists of one auricle and one ventricle.
- Reptiles and amphibians possess a three-chambered heart, which includes two auricles and one ventricle.

3. **Mammalian Heart Structure:**
- Mammals have a four-chambered heart. This structure includes two auricles (right and left) and two ventricles (right and left).

4. **Blood Flow in the Mammalian Heart:**
- Deoxygenated blood returns to the right side of the heart through the vena cavas.
- The right auricle receives this deoxygenated blood and sends it to the right ventricle, which then pumps it to the lungs for oxygenation.
- Oxygenated blood returns to the left side of the heart via the pulmonary veins.
- The left auricle receives this oxygenated blood and sends it to the left ventricle, which pumps it out to the body through the aorta.

5. **Conclusion:**
- Therefore, the heart of mammals is a four-chambered structure, which allows for efficient separation of oxygenated and deoxygenated blood.

**Final Answer:**
The heart of mammals is a four-chambered heart.

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