In frog, which of the following receives blood through vena cava?

Options

A. Sinus venosus
B. Conus arteriosus
C. Auricle
D. Ventricle

Answer

To answer the question "In frog, which of the following receives blood through vena cava?", we can follow these steps:

### Step 1: Understand the Structure of the Frog's Heart
Frogs have a three-chambered heart consisting of two atria and one ventricle. The heart also includes a structure known as the sinus venosus.

### Step 2: Identify the Function of the Sinus Venosus
The sinus venosus is a thin-walled sac that receives deoxygenated blood from the body through the vena cava. It acts as a reservoir for blood before it enters the atrium.

### Step 3: Analyze the Options Provided
- **Sinus Venosus**: This is the correct answer as it directly receives blood from the vena cava.
- **Coronary Arteriosus**: This structure is involved in the circulation of blood but does not receive blood from the vena cava.
- **Atria**: While the atria do receive blood, they do so from the sinus venosus, not directly from the vena cava.

### Step 4: Conclude the Answer
Based on the information above, the correct answer to the question is **sinus venosus**.

### Final Answer
**Sinus venosus receives blood through vena cava in frogs.**

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