Define the following terms:
Egestion, digestion, assimilation.

• Egestion is a form of releasing undesirable or excreted material from the digestive system of mammals.
• Digestion is the body's ability to digest food or nutrients. The food that is consumed, is converted into nutrients that are used for energy, growth, and cell repair.
• Assimilation is defined as the mobility of the digested food molecules into the body's cells to provide nutrients where they are used for different cellular metabolism. For example, glucose is used to provide energy. This is a two-step process, one with different acids and others with salivation and ingestion.