This is a bit of a shock to read, and see. After we've [humanity] have come so far with regard to anatomy and physiology. I read this:
Interstitium: New organ discovered in human body after it was previously missed by scientists
https://www.independent.co.uk/news/health/new-organ-human-body-interstitium-cancer-skin-scientists-discovery-new-york-a8275851.html
"Scientists have identified a new human organ hiding in plain sight, in a discovery they hope could help them understand the spread of cancer within the body. Layers long thought to be dense, connective tissue are actually a series of fluid-filled compartments researchers have termed the “interstitium”.
These compartments are found beneath the skin, as well as lining the gut, lungs, blood vessels and muscles, and join together to form a network supported by a mesh of strong, flexible proteins.
New analysis published in the journal Scientific Reports is the first to identify these spaces collectively as a new organ and try to understand their function. Remarkably, the interstitium had previously gone unnoticed despite being one of the largest organs in the human body."
Interstitium: New organ discovered in human body after it was previously missed by scientists
https://www.independent.co.uk/news/health/new-organ-human-body-interstitium-cancer-skin-scientists-discovery-new-york-a8275851.html
"Scientists have identified a new human organ hiding in plain sight, in a discovery they hope could help them understand the spread of cancer within the body. Layers long thought to be dense, connective tissue are actually a series of fluid-filled compartments researchers have termed the “interstitium”.
These compartments are found beneath the skin, as well as lining the gut, lungs, blood vessels and muscles, and join together to form a network supported by a mesh of strong, flexible proteins.
New analysis published in the journal Scientific Reports is the first to identify these spaces collectively as a new organ and try to understand their function. Remarkably, the interstitium had previously gone unnoticed despite being one of the largest organs in the human body."