Here's why:

* Areolar tissue is a type of loose connective tissue that is highly vascularized and contains various cell types, including fibroblasts, macrophages, and mast cells.

* Mast cells are important components of the immune system and are responsible for releasing histamine and other inflammatory mediators. These mediators contribute to allergic reactions and inflammation.

Because areolar tissue is widely distributed throughout the body, it makes sense that mast cells would be present there. They can quickly respond to threats like allergens or pathogens in a variety of locations.