Human anatomy seems to have been studied in such detail, however it is still possible to find unknown parts of the body.
In 2018, scientists discovered an interstitium, an entire network of fluid-filled tissue cavities that no one had ever noticed before.
Humans discovered these tissue cavities throughout the body, some of which are even under the skin. We also find them in the digestive tract, lungs and urinary tract, and in the surrounding muscles.
In the past, researchers believed that these tissue layers were a dense “wall” of collagen, a durable protein found in connective tissue.
However, the discovery of 2018 showed that it is not a “wall”, but a “liquid-filled highway”, as one author of the study – Professor Dr. Neil Teiz.
He says that there are connected, fluid-filled cavities in the tissues, supported by the structure of thick collagen “bundles”.
The researchers say these cavities have gone unnoticed for so long because they are not visible in the standard microscopy used to observe cell levels.
The discovery was successful because a new method was used to study living tissues at the microscopic level. They call the newly discovered system – interstitial.
Of course, the name is not the most important thing – the new discovery could lead to a turning point in many areas of medicine, such as cancer research.
The results of the study could explain why cancers that enter these tissue layers can spread to the lymph nodes. The researchers believe this is because the cavities contain lymph and are connected to the lymphatic system.