The lateral hearts in earthworm

Options

A. are situated in segments 7 and 9
B. are situated in segments 6 and 8
C. are situated in segments 8 and 10
D. are situated in segments 6 and 11

Explanation

### Step-by-Step Solution:

1. **Understanding the Structure of Earthworm Hearts**:
- Earthworms possess multiple hearts that are essential for their circulatory system. They have four pairs of hearts, which can be categorized into two types: lateral hearts and lateral esophageal hearts.

2. **Identifying the Lateral Hearts**:
- The lateral hearts are specifically responsible for connecting the dorsal blood vessel to the ventral blood vessel. This connection is crucial for the circulation of blood within the earthworm's body.

3. **Locating the Segments**:
- The lateral hearts are located in specific segments of the earthworm's body. According to biological studies, the lateral hearts are situated in segments 7 and 9.

4. **Analyzing the Options**:
- The question provides four options regarding the location of the lateral hearts:
1. Segments 7 and 9
2. Segments 6 and 8
3. Segments 8 and 10
4. Segments 6 and 11

5. **Selecting the Correct Answer**:
- Based on the information gathered, the correct answer is option 1: the lateral hearts in earthworms are situated in segments 7 and 9.

### Final Answer:
The lateral hearts in earthworms are situated in segments 7 and 9.

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