The primovascular system has been recently identified as a theoretical anatomical network that is distributed in cavities, tissues and the organs of the body. It is found around the blood vessels and lymphatic tissues, and covered with stem cells, protein, collagen, dna, hyurlonic acid

The PVS is considered to be a whole body system, and corresponds to the meridian system of acupuncture.  Research is being conducted on this system as it is a relatively new finding and has not been adopted yet by the mainstream medical system.

What is relevant here is that this 'new discovery' completely changes the way that the modern medical model looks at the anatomical systems.  The PVS helps to connect all of the organs and systems of the body in a way that they MMM has not done in the past.

It may be a channel for cell migration (movement of Qi)

It is also a testament to the idea that we have really only begun to understand the body systems, and that perhaps the 'modern' approach to viewing the human body could benefit from observing the ancient models.

The PVS was first studied in 1962-1965,but it was set aside because the primary researcher passed on and no one continued to search.  More recently this work has been re-visited, and it has returned to be re-evaluated. The founder of this system was Bong-Han Kim, and so the corpsicles and vessels that he discovered are being called the BH (Bonghan) corpuscles.

This system may be the anatomical explanation of the meridian system, the materials that it carries - stem cells, hyuralonic acid, and more correlate with the idea of Qi. This would provide a scientific explanation of the meridians, and the Qi that is said to travel throughout making this a less esoteric and more scientific approach. 

https://www.journal-jams.org/journal/view.html?doi=10.51507/j.jams.2022.15.1.61

https://www.sciencedirect.com/science/article/pii/S2005290112001045