रक्त वाहिका
Circulatory System en.svg
मानव परिसंचरण तंत्र का आरेख
लैटिन वास सेंगुइनेम

रक्त वाहिकाएं शरीर में रक्त के परिसंचरण तंत्र का प्रमुख भाग होती हैं। इनके द्वारा शरीर में रक्त का परिवहन होता है। तीन मुख्य प्रका की रक्त वाहिकाएं होती हैं: धमनियां, जो हृदय से रक्त को शरीर में ले जाती हैं; वे रक्त वाःइकाएं, जिनके द्वारा कोशिकाओं एवं रक्त के बीच, जल एवं रसायनों का आदान-प्रदान होता है; व शिराएं, जो रक्त को वापस एकत्रित कर हृदय तक ले आती हैं।

सन्दर्भसंपादित करें

साँचा:Cardiovascular system °==इन्हें भी देखें== ।

The blood vessels are the components of the circulatory system that transport blood throughout the human body.[1] These vessels transport blood cells, nutrients, and oxygen to the tissues of the body. They also take waste and carbon dioxide away from the tissues. Blood vessels are needed to sustain life, because all of the body's tissues rely on their functionality.[2]

There are five types of blood vessels: the arteries, which carry the blood away from the heart; the arterioles; the capillaries, where the exchange of water and chemicals between the blood and the tissues occurs; the venules; and the veins, which carry blood from the capillaries back towards the heart.

The word vascular, meaning relating to the blood vessels, is derived from the Latin vas, meaning vessel. Some structures – such as cartilage, the epithelium, and the lens and cornea of the eye – do not contain blood vessels and are labeled avascular.

Types- There are five main types of blood vessels: arteries, arterioles, capillaries, venules and veins. Arteries carry blood away from the heart to other organs. They can vary in size. The largest arteries have special elastic fibres in their walls.