Single type of circulation of blood is found in

Options

A. Fish
B. Frog
C. Man
D. Lizard

Answer

To determine which organism exhibits single type circulation of blood, we can analyze the options provided: fish, frog, man, and lizard.

### Step-by-Step Solution:

1. **Understanding Circulation Types**:
- There are two main types of blood circulation: single circulation and double circulation.
- In single circulation, blood passes through the heart only once during each complete circuit of the body.
- In double circulation, blood passes through the heart twice during each complete circuit of the body.

2. **Analyzing the Options**:
- **Fish**: Fish possess a single type of circulation. In fish, blood is pumped from the heart to the gills where it gets oxygenated and then flows directly to the rest of the body. This means blood only passes through the heart once during its journey.
- **Frog**: Frogs have a double circulation system. They have a three-chambered heart that allows blood to be pumped to the lungs for oxygenation and then to the body.
- **Man**: Humans also have a double circulation system. The heart has four chambers, allowing blood to be pumped to the lungs and then to the rest of the body.
- **Lizard**: Like frogs and humans, lizards also have a double circulation system.

3. **Conclusion**:
- Based on the analysis, the only organism from the options provided that exhibits single type circulation is the fish.

### Final Answer:
The single type of circulation of blood is found in **fish**.