What Order Does The Bolus Of Food Travel? Essay
• The bolus of food first travels to the oral cavity, pharynx, esophagus, stomach, small intestine, and then to the large intestine.
2. How long does the food remain in each segment of the digestive tract and what physiological processing takes place during this time?
• Chemical and mechanical digestion begins in the oral cavity. Temperature, taste, texture are sensed, and the saliva helps the chemical digestion because it is secreted by the salivary glands. The breakdown of the enzymes in the saliva helps the food to be swallowed. The mechanical breakdown of the food is from the teeth, and when the food is swallowed, the pharynx is where the food is passed. The oral cavity and esophagus are connected because of the pharynx. The food is moved down to the stomach by the esophagus, so the bolus is in the stomach. Acting as a storage organ, breaking down the bolus mechanically, and secreting gastric juices to cause chemical digestion are the processes of the stomach. The main digestion source is the small intestine, and it is the site for absorption for fats, sugars, water, and proteins. The large intestine is connected to the small intestine and it helps with absorbing salts, and water to help with waste. Fluid enters the large intestine first but once there is absorption of water, only food and bacteria remains undigested. About 3-4 times a day contractions happen in the large intestine so the fecal…