human gastrointestinal system diagram hand draw vintage engraving style black and white clipart on white background

anatomical anatomy antique anus appendix art background biology body classical clip colon diagnosis diagram digestion digestive doctor drawing duodenum education engraved engraving esophagus gallbladder gastrointestinal health healthy human illustration ink inspiration intestinal intestine isolated jejunum large liver medical medicine old organ pancreas rectum retro sigmoid sketch stomach style system transverse vector vintage