The aperture between right auricle and right ventricle is guarded by one way valve called the

Options

A. semilunar valve
B. tricuspid valve
C. bicuspid valve
D. valve of inferior vena cava

Answer

To answer the question regarding the valve that guards the aperture between the right auricle (atrium) and the right ventricle, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Structures**: Understand that the heart has four chambers: the right auricle (atrium) and the right ventricle are two of them. The right auricle receives deoxygenated blood from the body through the superior and inferior vena cavae and sends it to the right ventricle.

2. **Understand the Function of Valves**: Valves in the heart ensure that blood flows in one direction and prevents backflow. Each valve is located at the junction of two chambers.

3. **Examine the Options**:
- **Option 1: Semilunar Valve**: This is incorrect. Semilunar valves (aortic and pulmonary) are located at the exits of the ventricles, not between the atria and ventricles.
- **Option 2: Tricuspid Valve**: This is the correct answer. The tricuspid valve is located between the right auricle and the right ventricle and prevents backflow of blood into the atrium when the ventricle contracts.
- **Option 3: Bicuspid Valve**: This is incorrect. The bicuspid valve (also known as the mitral valve) is located between the left auricle and the left ventricle.
- **Option 4: Valve of the Inferior Vena Cava**: This is also incorrect. The valve associated with the inferior vena cava is called the Eustachian valve, which is not the same as the valve between the right auricle and right ventricle.

4. **Conclusion**: Based on the analysis of the options, the valve that guards the aperture between the right auricle and the right ventricle is the **tricuspid valve**.

### Final Answer:
The aperture between the right auricle and right ventricle is guarded by a one-way valve called the **tricuspid valve**.

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