What is the primary function of the tiny blood vessels called capillaries?

Explanation

Capillaries are the smallest blood vessels in the body, with walls just a single cell thick, allowing oxygen, nutrients, carbon dioxide, and other waste products to pass efficiently between the blood and surrounding body tissues. They form an extensive network connecting the smallest arteries to the smallest veins, ensuring that nearly every cell in the body is located close to a capillary. This thin-walled structure is essential for the rapid diffusion of substances that capillaries are specifically designed to support. Explore more Everyday Science MCQs on mcqstutor to keep practicing.