Digestive chemicals.
Digestion is the breakdown of food into simpler molecules that can be absorbed by the body. The digestive system is actually a long hollow tube called the gastrointestinal tract, or GI tract. The digestive system includes the mouth, pharynx, esophagus, stomach, small intestine, and large intestine. The first task of the digestive system is to break down food into a fine pulp (mechanical digestion). When the food is physical broken down, digestive chemicals break the food down into small molecules (chemical digestion). The mouth is the organ in which the process of digestion begins. The digestive system uses mechanical and chemical methods to break food down into nutrient molecules that can be absorbed into the blood. Once in the blood, the food molecules are routed to every cell in the animal's body. There are two types of animal body plans as well as two locations fordigestion to occur. Structure of Cellulose. Cellulose is a polymer of glucose which is digested by a variety of enzymes. In simple terms, the enzymes may either cleave glucose dimers from the end of the polymer (exocellulase), or fragment the cellulose polymer into smaller molecules by internal digestion of the polymer (endocellulase). Big Ideas Digestion. Digestion is the breakdown of food into simpler molecules that can be absorbed by the body. The digestive system is actually a long hollow tube called the gastrointestinal tract, or GI tract. The digestive system includes the mouth, pharynx, esophagus, stomach, small intestine, and large intestine. Digestion is the process of breaking down organic molecules into pieces small enough to cross the cell membranes of the digestive tract. The process of absorption allows the membranes to be crossed and pieces to enter the blood. Eventually they are delivered to cells where they can be used.
https://msu.edu/~potters6/te801/Biology/biounits/digestion.htm https://msu.edu/~potters6/te801/Biology/biounits/digestion.htm http://www2.estrellamountain.edu/faculty/farabee/biobk/BioBookDIGEST.html http://bugs.bio.usyd.edu.au/learning/resources/Mycology/Feeding/extracellDigestion.shtml https://msu.edu/~potters6/te801/Biology/biounits/digestion.htm http://people.fmarion.edu/pking/humanphys/digestion.html
what are organic molecules digested by