Fill in the Blank QuestionFill in the blank question.Microscopic, thin-walled vessels that connect the smallest arterioles to the smallest venules are called .

The microscopic, thin-walled vessels that connect the smallest arterioles to the smallest venules are called capillaries.

Capillaries are an essential part of the circulatory system, facilitating the exchange of gases, nutrients, and waste materials between blood and surrounding tissues. Their thin walls allow for the efficient transfer of these substances through processes such as diffusion and osmosis. Capillaries form a vast network throughout the body, ensuring that all cells are sufficiently supplied with oxygen and nutrients while also providing a means for waste removal. This intimate connection between arterioles, venules, and capillaries forms the microcirculation, which is crucial for maintaining cellular homeostasis and overall health.