Capillary

Real World Example

Imagine you're at a bustling farmer's market, trying to exchange your fresh produce for other goods you need. This scenario is similar to how capillaries function in the body, acting as small exchange hubs where essential items are swapped. Just as you trade your vegetables for fruit and bread, capillaries facilitate the exchange of oxygen and nutrients for carbon dioxide and waste products between blood and tissues, ensuring everyone—whether in the market or in the body—gets exactly what they need.