Digestive System

Anatomic Model Of The Upper Part Of The Digestive Tract Of An Adult Human Body Left Lateral View Of A Median Section Of The Head, Anterior View Of The Chest. The Mouth Is The Starting Point Of The Digestive Tract. Its Opening Is Mainly Controled By The Orbicularis Oris Muscle Of The Lips In Red. At The Time Of The Food Intake, The Tongue Moves Downwards By The Action Of The Underlying Genioglossus Muscle. Underneath, The Geniohyoideus And Mylohyoid Muscles Allow Swallowing; They Are Connected To The Mandible, Bone Of The Lower Jaw In Beige. The Palatine Uvula, Lying At The End Of The Palate, Moves Then Upward To Selectively Close The Access To The Nose. The Swallowed Food Goes Next In The Fauces, An Opening Between The Oral Cavity And The Pharynx. The Latter Leads Both Anteriorly To The Larynx And Posteriorly To The Esophagus In Tan. The Esophagus Brings The Alimentary Bolus To The Upper Part Of The Stomach In Nude, The Cardia. In The Body Of The Stomach, The Food Is Stored And Mixed With Enzymes In Order To Reduce It In A Semiliquid Substance, The Chyme. The Food Passes Then Across The Pylorus, Portion Of The Stomach Making The Junction With The Small Intestine, Where The Digestion Goes On. The Liver In Burgundy Has Been Turned In Order To Visualize The Gallbladder In Ochre Lying On Its Posterior Side. The Liver Cells Notably Produced The Bile, Which Is Then Concentrated And Stored In The Gallbladder. The Bile Is Next Released Into The Duodenum, First Segment Of The Small Intestine, Where It Contributes To The Lipid Absorption. (Photo By BSIP/UIG Via Getty Images)