Essay Title: 

Process Analysis :scientific,mechanical, or natural analysis

March 24, 2016 | Author: | Posted in english, literature and language

The human body , being very complex in its nature , functions and forms involves numerous significant processes that are indispensable to human life . Every single part in the human body has intricate functions every part contributes to human body development and the maturity of each part . Digestion , being one of these bodily processes , is a vital human activity necessary to sustain growth , development and proper body functioning . Every time we take in bread , meat , and vegetables , they are not yet in a form that the body can use as nourishment . Therefore , our food [banner_entry_middle]

and drink must be changed first into smaller molecules of nutrients before they can be absorbed into the blood and carried to cells throughout the body

Digestion is defined as the process by which food and drink are broken down into their smallest parts so that the body can use them to build and nourish cells and to provide energy . In humans , digestion begins in the mouth where food is broken down with the aid of the teeth . This process stimulates the glands in the mouth to release digestive enzymes such as salivary amylase which hasten the breakdown of carbohydrates Moreover , chewing causes the release of saliva which helps form food into a bolus that can be easily passed through esophagus . Once food is chewed properly , the food is swallowed and the bolus is pushed down through the peristalic movement which is the involuntary wave-like contraction of smooth muscle tissue happening inside the human body During swallowing , the uvula and the soft palate retract upward and to the rear to close the nasopharynx which prevents the food from entering the nasal passages by triggering closure of the soft palate . When swallowed , the food enters the pharaynx which makes special adaptations to prevent chocking or aspiration . It is then the function of the epiglottis , which is made up of soft cartilage , to close temporarily during swallowing to prevent food and liquid from entering the trachea The food enters the stomach upon passage through the cardiac sphincter In the stomach , through the process of heuristic churning , the food is further broken apart and is thoroughly mixed with a digestive fluid composed mainly of hydrochloric acid and other digestive enzymes to further break down the proteins . In the stomach , the parietal cells secrete a compound known as intrinsic factor , necessary for the absorption of Vitamin B12 or Cobalamin . After being processed in the stomach , food is passed to the small interstine via the pyloric sphincter . This is where most of the digestive process occurs . Most nutrient absorption takes place in the small intestine . The nutrients pass through the small intestine ‘s wall , which contain the villi . The blood , which has absorbed nutrients , is carried away from the small intestine via the hepatic portal vein and goes to the liver for filtering , removal of toxins , and nutrient processing . After going through the small intestine , the food then goes to the large intestine In the large intestine , water is reabsorbed , and the foods… [banner_entry_footer]

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