The function of the human digestive system is to provide materials for energy, growth and repair.
The following processes are involved in the human
In general, food can be divided into three categories:
Other necessary nutrients include:
The initial breakdown of food takes place in the oral cavity, where food is chewed, and some of it is dissolved in saliva.
Swallowing can be divided into three phases as follows:
movement of food out of the oral cavity
movement of food through the pharynx
movement of food through the esophagus
The epiglottis is a thin flap of cartilage which folds over the entrance to the larynx during swallowing thus preventing food from entering the trachea.
The stomach provides temporary storage for food and it initiates certain digestive processes, for example it begins the breakdown of proteins.