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Blood vessels circulate blood throughout your body. They help deliver oxygen to vital organs and tissues, and also remove waste products. Blood vessels include veins, arteries and capillaries.
Your cardiovascular system functions with the help of blood vessels. Some blood vessels (veins) return blood to your heart, while others (arteries) carry blood away from your heart. Your blood vessels work with your heart and lungs to continuously move blood through your body. Here’s how:
The great vessels of the heart are major blood vessels that connect directly to your heart. These arteries and veins circulate blood between your heart and lungs, and between your heart and the rest of your body.
Vascular malformations, or abnormal blood vessel changes, include venous malformations and arteriovenous malformations (AVMs). They may look like birthmarks that develop during infancy. AVMs can form in the brain or spine, causing life-threatening problems.
Veins are blood vessels that carry oxygen-poor blood to your heart. Pulmonary veins are an exception because they carry oxygen-rich blood from your lungs to your heart. Veins in your legs fight gravity to push blood up toward your heart.
Arteries, a critical part of your cardiovascular system, are blood vessels that distribute oxygen-rich blood to your entire body. These tube-like vessels and the muscles inside them ensure your organs and tissues have the oxygen and nutrients they need to function.
Pulmonary valve: Opens when blood flows from your right ventricle to your pulmonary arteries (the only arteries that carry oxygen-poor blood to your lungs). Blood vessels. Your heart pumps blood through three types of blood vessels: Arteries carry oxygen-rich blood from your heart to your body’s tissues. The exception is your pulmonary ...
The femoral artery is the main blood vessel supplying oxygen-rich blood to your lower body. It starts in your upper thigh, near your groin and runs down to the back of your knee. The function of the femoral artery and its branches is to supply your lower body with blood.
Blood flows from your arteries into even smaller blood vessels called arterioles. Your arterioles link up with vessels that are smaller yet, called capillaries. Your capillaries have very thin walls that allow oxygen and nutrients to pass into your organs and tissues.
Hemorrhoids are swollen blood vessels in your anus or rectum. They’re called internal hemorrhoids above the pectinate line, and external hemorrhoids below it. Anal fissure. An anal fissure is a tear in your anus lining. It can cause pain and bleeding. Anal yeast infection.