The human body is complex and consists of several interconnected systems, blood vessels, and structures. A specific name is given to every tube or structure. If we specify blood vessels, the blood vessels are the passageways that aid the blood flow in the body. Some common terminologies are veins, arteries, or capillaries.

Analysis Of Veins

If we discuss the structure of veins, the veins are the pathways or tubes responsible for transporting or supplying blood without oxygen from all over the body to the human heart. According to scientific data, the veins have nearly 70% to 80% of blood. The veins have different classification depending on the work it does and the structure it has. Out of all the veins that primarily supply blood that does not enrich with oxygen to the heart, only pulmonary veins carry enriched blood from the pulmonary organs to the left atrium.

Composition Of Vein

When we discuss the composition of veins, it comprises three coverings. However, the arteries and veins have similar covering but are different in dimensions. Let us see some of the distinguishing coverings of the veins.


Outer Covering

The outside layer of the vein is the collagen layer. The outer collagen layer in the veins is thin compared to the arteries. The collagen layer or outsider covering is very important as it provides structural support. The thick outer layer in the arteries is because of high blood pressure. Therefore, the outer layer in the veins is not thick because of the low pressure.

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