The tangular sac liko structure which receives blood through the vena cava Infrog is

Options

A. Ventricle
B. Sinus verosus
C. Hepatic portal system
D. Conus arteriosus

Answer

To solve the question regarding the triangular sac-like structure in frogs that receives blood through the vena cava, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Structure**: The question asks for a specific structure in the frog's heart that receives blood from the vena cava. It is essential to identify the chambers of the frog's heart.

2. **Identifying the Chambers**: The frog's heart consists of several chambers, including the atria (auricles), ventricles, and other structures. The vena cava brings deoxygenated blood into the heart.

3. **Recognizing the Function of the Chambers**:
- The **ventricles** are the lower chambers of the heart that pump blood out but do not receive blood directly from the vena cava.
- The **auricles** receive blood from the body and lungs but are not the primary structure receiving blood from the vena cava.

4. **Identifying the Sinus Venosus**: The **sinus venosus** is an enlarged region located between the vena cava and the right atrium. It acts as a collecting chamber for deoxygenated blood returning from the body through the vena cava.

5. **Conclusion**: Based on the above analysis, the triangular sac-like structure that receives blood through the vena cava in frogs is the **sinus venosus**.

### Final Answer:
The triangular sac-like structure which receives blood through the vena cava in frogs is called the **sinus venosus**.

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