All vessels feature varying lumen size. The lumen is the hollow opening or the space inside the blood vessel. Artery Vein Capillary Function Carry blood away from the heart (usually oxygenated ...

Inside you, there is an amazing network of blood vessels, the tubes that carry blood all around your body. Every part of the body needs oxygen, food and water. The blood vessels are a bit like ...

Medically reviewed by Angela Ryan Lee, MD Hypertension (high blood pressure) can damage your heart and blood vessels and increase your risk of heart attack, stroke, and other heart conditions. Due to ...

Lymphatic vessels are composed of a single layer of endothelial cells, allowing the transfer of fluids, cells and large molecules from surrounding tissues into the vessels. These vessels must be ...