oral cavity, pharynx and esophagus glyph icon. upper section of alimentary canal. silhouette line . negative space

alimentary anatomical anatomy badge bio biology body canal cavity concept design digestive esophagus face gastrointestinal glyph head health human icon illustration internal isolated line logo medical medicine mouth oesophagus oral organ part pharynx physiology pictogram science section shape sign silhouette structure symbol system throat tract upper vector web