CheckPoint: Human Digestion
University of Phoenix Axia
Human Digestion 2
Have you ever wondered how the human digestion process works? The human digestion process starts with the mouth. The mouth is where the food enters. Then, saliva moistens the food while you chew it with your teeth. The food then turns into a soft mass called a bolus. It then moves to the pharynx, a passageway that is responsible for swallowing. The bolus then moves from the pharynx to the esophagus, a part of the gastrointestinal tract that goes from the pharynx to the stomach, an organ that mixes food and acids to break down food in the digestion process. The bolus is mixed with acid to change into chyme, a food mass that is semiliquid, when it gets to the stomach. In the stomach, food is partially digested and leaves the stomach in 2 to 6 hours. The time it takes for the chyme to leave the stomach depends on the size and type of the meal that was eaten. Once the chyme leaves the stomach, it goes to the small intestine, a tube-shaped organ that completes the digestion of food. It is also where the majority of nutrient absorption occurs. Once the chyme leaves the small intestine, it enters the large intestine, another tube-shaped organ. It includes the colon and rectum. This is where some water and vitamins are absorbed. Once the chyme leaves the large intestine, it exits the body from the anus, an external opening where digested food leaves the body through feces.
Human Digestion 3
Human Digestion Activity. Retrieved from http://corptrain.phoenix.edu/axia/sci241/sci241-digestivetract.html