Spider veins and varicose veins are a common disease
You will find detailed information in our vein dictionary
The vessels provide the channels for carrying blood or lymph around the body. Lymph vessels transport lymph and blood vessels transport blood.
Blood vessels are divided into arteries, capillaries, and veins.
Vessels carrying blood from the heart into the body are called arteries. The arteries contain bright red blood that is rich in oxygen and nutrients. The pulmonary arteries are the only exception, as they carry oxygen-depleted blood from the heart to the lungs.
Arteries branch continuously to end in very fine capillaries, where oxygen, nutrients, and waste products are exchanged between the blood and the tissues. Oxygen and nutrients are released from the capillaries into the tissues and waste products from the tissues are taken up into the capillaries.
The blood then reaches the veins. The veins collect the blood, which is now dark red, oxygen-depleted, and contains large quantities of waste products, and transport it back to the heart. The pulmonary veins are the only exception, as they carry oxygen-rich blood from the lungs to the heart. The leg veins have the difficult task to return the blood to the heart against the force of gravity.