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Biology, 08.12.2020 19:10 probablyacommunist

The human body operates like a machine and consistsofmanyparts, ororgans, thatmakeupsystems. Oneof these systems is the digestive system. Digestion begins in the . The mechanicallydigest the food by breaking it into smaller pieces. This mechanical breakdown turn speeds up digestion. The more surface area the more thecan interact .Afterbeingbroken up into bits and saturated with saliva, the. Thisballis called a . The tongue launches the bolus to the back of the throat also known as the. The folds downward to prevent the bolus from entering the trachea or thewindpipe. The bolus travels down the by a wave of muscular contractions called .muscle is responsible for these involuntary muscularcontractions. which contains digestive juices such as acid andpepsin. Thestomachusesitsmuscles to churn the food and both mechanically and chemically break it down further. The bolus turns into aliquid that has the consistency of a milkshake. This “milkshake” is called . The chyme leaves thestomach andentersthe.,the secretes bile (produced by the liver) which breaks down fats into .The also secretes pancreatic juices that further break down the food chemically. Theare then absorbed by the fingerlike projections calledwhich line the wall of the Giann Cuadros B 8/12/2020 mouth small intestine. The villi absorb the nutrients directly into the . The remaining chyme leaves thesmall intestine and enters the where any remaining nutrients and are absorbed. Thechyme loses its milkshake consistency and develops into a semi solid called feces. The feces is stored in the and lastly, eliminated through the muscular opening called the . The digestive systemrelies on various organs such as the liver, pancreas, stomach, and intestines to name a few. Without thedigestive system the body would not be able to absorb essential nutrients from food nor get the energy thebody needs to function.

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