Structural Biochemistry/Free energy - Standard Gibbs Free Energy of Formation. 1  When we have to consider the relationship between Gibbs free energy and the standard-state free energy of a reaction, we use this equation... 2  to calculate Gibbs free energy at that of time under a specific circumstances.
digestive system definition. The organs and glands in the body that are responsible for digestion. The digestive system begins with the mouth and extends through the esophagus, stomach, small intestine, and large intestine, ending with the rectum and anus. Other organs in this system include the liver, pancreas, gallbladder, and appendix.
Upper GI Tract. The upper GI tract consists of the mouth, pharynx, esophagus, and stomach. This is where ingestion and the first phase of digestion occur. Includes the tongue, teeth, and buccal mucosa or mucous membranes containing the ends of the salivary glands, continuous with the soft palate, floor of the mouth, and underside of the tongue.