Coronary arteries are blood vessels that deliver oxygen-rich blood and nutrients to the heart, according to Johns Hopkins Medicine. Veins carry oxygen-poor blood back to the heart. The aorta is the main artery leaving th... More »

Often, a person experiences no symptoms of neck artery blockage until the artery is completely blocked, resulting in a stroke, explains Healthline. The stroke or transient ischemic attack is accompanied by sudden weaknes... More »

According to HealthCentral, the artery that runs from the heart to supply blood to the rest of the body is the aorta. Many forces in the body cause the aorta to weaken, and as it weakens, it becomes enlarged. Enlarged ao... More »

The coronary blood vessels include both arteries and veins, according to the Cleveland Clinic. As stated by Stanford Hospital, coronary arteries supply oxygen-rich blood to the muscle of the heart. The Cleveland Clinic s... More »

The human body contains three main coronary arteries that provide oxygen and nutrients to the heart and multiple smaller coronary arteries. The smaller coronary arteries branch off from the main ones. More »

The smallest blood vessels in the human body are capillaries, which connect arteries and veins. Capillaries can be as small as 5 micrometers wide. The average adult body has about 10 billion capillaries. More »

All of the blue-colored blood vessels on a blood flow diagram show passages carrying deoxygenated blood from the heart to the lungs, while all of the red-colored passages show oxygenated blood being circulated throughout... More »