2. Complete the table of the major digestive organs by describing the function o

Question

2. Complete the table of the major digestive organs by describing the function of, digestive substances (ex: hydrochloric acid, salivary amylase, bacteria, etc.) added to, and the consistency of food (liquid, solid,chyme, bolus, etc.)) in the following structures.

Structure

Function

Digestive substance added, if any

Consistency of food

Oral cavity (mouth)

Pharynx

Esophagus

Stomach

Small intestine: duodenum

Small intestine: jejunum

Small Intestine: ileum

Large intestine: cecum

Large intestine: appendix

Large intestine: colon

Large intestine: rectum

Structure

Function

Digestive substance added, if any

Consistency of food

Oral cavity (mouth)

Pharynx

Esophagus

Stomach

Small intestine: duodenum

Small intestine: jejunum

Small Intestine: ileum

Large intestine: cecum

Large intestine: appendix

Large intestine: colon

Large intestine: rectum

Explanation / Answer

1)oral cavity: in the oral cavity the first step of digestion takes place , and mechanical digestion begins when the teeth break down ingested food, then saliva softens the food and aids in mechanical and chemical process of digestion takes place and saliva also cleanses the mouth , and digestive substances added to it is salivary amylase and lingual lipase,the consistency of food is food bolus(food bolus), 2)pharynx: from mouth the food bolus moves it to the oropharynx then next is involuntary the bolus passes through the pharynx, 3)esophagus: from pharynx to esophagus , the upper esophageal sphincter opens only during the process of swallowing to permit food to pass from the esophagus to stomach. 4)stomach:food bolus from esophagus reaches stomach, here digestion of food takes place, the digestive juices added to food bolus is proteases and HCl(kills bacteria) and food is churned in the stomach called peristalsis , food consistency is chyme. 5)small intestine dueodenuum: the chyme recieves from the stomach and plays a vital role in the chemical digestion of chyme, the pancreatic juices released to the dueodenum and the rate of the digestion is increased. 6) small intestine jejunum:the ingested food in the jejunum is covered by mucosa which helps in the absorb nutrients from the ingested food. 7)small intestine : ileum: the function is vitamin B12 and bile salts, the surface area of helps in adsorption of enzyme moleculs and for absorption of products of digestion, the chyme if present. 8)large intestine cecum: helps absorb fluids and salts that remain after completion of intestinal digestion and absorption and to mix its contents with a lubricating substances. chyme. 9) large intestine appendix: it helps in maintaining gut flora, 10)large intestine: colon:it reabsorbs fluids and process waste products from the body and prepare for its elimination. 11) large intestine rectum: the final portion of the large intestine, it is temporary storage site for feces

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