According to the authors, the vascular system exhibits common histology. However, there are significant differences across the various systems. The majority of blood artery walls may be structured histologically into three layers: an inner tunica intima, a middle tunica medium, and an exterior tunica externa or adventitia. Each layer has a particular cellular makeup and connective tissue structure. The inner tunica intima consists of a single layer of endothelial cells enclosing the inner vascular lumen. It is maintained by a basement membrane containing laminin, collagen IV and XVIII, von Willebrand factor, and perlecan. In addition, the tunica media is the intermediate layer of the majority of blood vessel walls. It comprises largely diagonally aligned smooth muscle cells and is supported by a basement membrane and extracellular matrix made primarily of collagen and elastin fibers. On the other hand, the adventitia is the outermost layer of the blood vessel wall. Its predominant cellular components are fibroblasts and myofibroblasts, which are responsible for the manufacture of the fibro-elastic extracellular matrix that distinguishes this layer.

With all of the aforementioned information in mind, this article provides students with relevant knowledge regarding the vascular system. The authors were able to present readers with information that might be relevant in the future, particularly for pre-med students like us. The vascular system is an intricate transport system. That being said, I believe that this article was actually an efficient primary basis for readers to properly understand how it functions, it’s histology, and how it helps to the effective functioning of the body.