Internal organs

Blood vessels

Blood vessels

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The blood vessels form a kind of tube system in our body and serve to transport the blood, whereby they can be differentiated according to their function in different types. Fresh blood is pumped from the heart first into the so-called main artery (aorta), then into the arteries (arteries) and arterioles (small arteries) and from there into the so-called capillaries (hair vessels). Then the blood, which is now low in oxygen, flows back to the heart via the venules (small veins), veins (blood vessels) and vena cava. Together with the heart, the blood vessels form the bloodstream.

The blood circulation system only works as long as there are no damage and injuries to the blood vessels. Minor damage to the blood vessels can usually be compensated for by the body, but major damage to the blood vessels can quickly lead to life-threatening complications. For example, aorta rupture is a medical emergency that often leads to the death of those affected. Thrombosis (occlusion of the blood vessels by a blood clot) can also quickly become life-threatening. The same applies to violations of the blood vessels - and corresponding bleeding - in the brain. If arteries are injured in the course of an accident, this is usually associated with heavy bleeding and blood loss can also quickly become a fatal danger.

In addition to the acute impairment of the blood vessels, chronic diseases are also possible, such as so-called varicose veins (varicose veins), hardening of the arteries (arteriosclerosis) or peripheral arterial occlusive disease (PAD). The range of possible diseases of the blood vessels is extremely varied overall and the threatening health complaints are correspondingly different. However, it is not uncommon for there to be a considerable health risk, which is why urgent medical help should be sought if there is suspicion of this. Sometimes an operation is necessary after the diagnosis, although many operations on the blood vessels are already routine operations in vascular surgery. (fp)

Blood vessels, veins & veins

(Image: Design Cells /

Author and source information

Video: Blood Vessels, Part 2: Crash Course Au0026P #28 (August 2022).