The Vertebrate (mostly human) Digestive System Mouth ...
The Vertebrate (mostly human) Digestive System Mouth ...
The Vertebrate (mostly human) Digestive System Mouth ...
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Gastrointestinal tract has a layered structureLumen - interior spaceMucosa - innermost layerof epitheliumSubmucosa - connectivetissueMuscularis - double layerof smooth musclecircular and longitudinalSerosa - connective tissuecovers exteriorNerve plexuses - insubmucosa, regulateactivitiesGlands - in submucosa and outside serosa - secrete substances intolumen