The digestive system (apparatus digestorius) serves to absorb and process the energy needed for the functioning of the human body, which it produces from the absorbed nutrients and water. Our digestive system breaks down the food we eat into monomers (the smallest substances that can be used by the body) with the help of enzymes, which will provide the body with energy. The most important monomers required for energy production are amino acids, fatty acids, nucleotides and monosaccharides.
The human digestive system can be divided into 3 parts: anterior, middle and posterior intestines.
The foregut can be divided into 2 further sections: the first section is the oral cavity, which prepares the food by chopping for various enzymatic effects: This is where the breakdown of starch by the enzyme amylase in saliva begins. The second stage begins with the pharynx and then continues with the oesophagus, through which food enters the stomach. The stomach mixes, stores and pre-digests food. Additionally, it also has a protective function, as some of the incoming microorganisms are killed here.