You're on a roll — Here are the definitions of those terms as used in digestion: Ingestion: This is the process of taking food into the body* through the mouth. It's the first step of digestion. Absorption: This is the process by which digested food molecules (like glucose, amino acids, fatty acids) pass from the digestive tract (mainly the small intestine) into the bloodstream or lymphatic system*. From there, they are transported to various parts of the body. Assimilation: This is the process by which the absorbed nutrients are taken up by the body's cells and then used for energy, growth, repair, or storage*. It's when the body actually utilizes the nutrients it has absorbed. Got more? Send 'em 📸