Which of these has a closed type of circulatory system?

Options

A. Palamnaeus
B. Labeo
C. Aplysia
D. Periplaneta

Answer

To determine which of the given options has a closed type of circulatory system, we can follow these steps:

### Step 1: Understand the types of circulatory systems
- A closed circulatory system is one where the blood is contained within blood vessels, allowing for more efficient transport of nutrients and oxygen.
- An open circulatory system, on the other hand, has blood that is not always contained within vessels and can flow freely through cavities.

### Step 2: Analyze the options
1. **Palame News**: This organism belongs to the phylum Arthropoda, which is known to have an open circulatory system.
2. **Labio**: This is a vertebrate, and all vertebrates are characterized by having a closed circulatory system.
3. **Applesia**: This refers to a group of sea slugs, which also have an open circulatory system.
4. **PeriPlaneta**: This is another organism from the phylum Arthropoda, which again has an open circulatory system.

### Step 3: Identify the correct answer
From the analysis above, the only organism with a closed type of circulatory system is **Labio** (Option 2).

### Final Answer
The correct answer is **Option 2: Labio**.

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