Three Major Capillary Types: The three major capillary types are continuous, fenestrated, and sinusoidal, each adapted to different levels of permeability based on tissue needs.
Capillary Bed: Capillary beds are networks of microscopic vessels where exchange of oxygen, nutrients, and waste occurs between blood and surrounding tissues, regulated by precapillary sphincters that control blood flow.
Scott Sundick, MD, is a board-certified vascular and endovascular surgeon. He currently practices in Westfield, New Jersey. Capillaries are the smallest blood vessels in the body, connecting the smallest arteries to the smallest veins. These vessels are often referred to View Diagram Capillary Microcirculation Diagram Image
