The opening between the right atrium and the right ventricle is guarded by which valve ?

Options

A. Monocuspid valve
B. bicuspid valve
C. Tricuspid valve
D. Tetracuspid valve

Answer

To answer the question about which valve guards the opening between the right atrium and the right ventricle, follow these steps:

### Step 1: Identify the Heart Chambers
The heart consists of four chambers: the right atrium, right ventricle, left atrium, and left ventricle. The right atrium receives deoxygenated blood from the body, while the right ventricle pumps this blood to the lungs for oxygenation.

**Hint:** Remember the function of each chamber of the heart to understand the flow of blood.

### Step 2: Understand the Valves of the Heart
The heart has several valves that ensure unidirectional blood flow. The main valves include:
- Tricuspid valve (between right atrium and right ventricle)
- Bicuspid (mitral) valve (between left atrium and left ventricle)
- Pulmonary valve (between right ventricle and pulmonary artery)
- Aortic valve (between left ventricle and aorta)

**Hint:** Familiarize yourself with the names and locations of the heart valves.

### Step 3: Focus on the Right Side of the Heart
Since the question specifically asks about the opening between the right atrium and right ventricle, we need to focus on the valve that is located there.

**Hint:** Think about the right side of the heart and which valve would regulate blood flow from the atrium to the ventricle.

### Step 4: Identify the Correct Valve
The valve that guards the opening between the right atrium and the right ventricle is called the **tricuspid valve**. It is named "tricuspid" because it is composed of three flaps (or cusps).

**Hint:** The prefix "tri-" indicates the number of flaps in the tricuspid valve.

### Step 5: Conclusion
Therefore, the correct answer to the question is the **tricuspid valve**.

**Final Answer:** The opening between the right atrium and the right ventricle is guarded by the **tricuspid valve**.