Mesentry is an organ which connects your intestine to your abdomen.It performs important functions that affect systems throughout the body, from cardiovascular to immunological.

When was it talked about it earlier?
Leonardo da Vinci depicted it as one contiguous organ, and it remained that way for centuries until 1885, when Sir Frederick Treves' findings presented the mesentery as fragmented amongst the small intestine, transverse colon and sigmoid colon.