Which type of blood cell is similar to mast cells of connective tissue in producing heparin, histamine and serotonin?

Explanation

To answer the question regarding which type of blood cell is similar to mast cells of connective tissue in producing heparin, histamine, and serotonin, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Function of Mast Cells**:
- Mast cells are a type of connective tissue cell that play a crucial role in the immune response. They produce substances like heparin (an anticoagulant), histamine (involved in inflammatory responses), and serotonin (which can affect mood and digestion).

2. **Identify Similar Blood Cells**:
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