The atrium and ventricle of the same side is separated by

Options

A. atrioventricular valves
B. atrioventricular septum
C. both (a) and (b)
D. tricuspid valves

Answer

To answer the question "The atrium and ventricle of the same side is separated by," we will break down the information step by step.

### Step-by-Step Solution:

1. **Understanding the Heart Structure**:
- The heart consists of four chambers: two atria (upper chambers) and two ventricles (lower chambers). Each side of the heart has one atrium and one ventricle.

2. **Identifying the Separation**:
- The atrium and ventricle on the same side of the heart are separated by a valve. There are two sides to consider: the right side (right atrium and right ventricle) and the left side (left atrium and left ventricle).

3. **Right Side Separation**:
- On the right side, the atrium (right atrium) and ventricle (right ventricle) are separated by the **tricuspid valve**. This valve has three flaps and is also known as the right atrioventricular valve.

4. **Left Side Separation**:
- On the left side, the atrium (left atrium) and ventricle (left ventricle) are separated by the **bicuspid valve** (also known as the mitral valve). This valve has two flaps.

5. **Conclusion**:
- Therefore, the atrium and ventricle of the same side are separated by the tricuspid valve on the right side and the bicuspid valve on the left side.

### Final Answer:
The atrium and ventricle of the same side are separated by:
- Right side: Tricuspid valve
- Left side: Bicuspid valve