BIS 134 Chapter Notes -Small Intestine, Esophagus, Chemical Process
Document Summary
Digestive system: nutrition, metabolism biological process in which living organisms constantly exchange substances with the environment, food intake digestion absorption (transport of substances to the cell) - cellular metabolism, basic types of nutrition. Organic substances - carbohydrates, fats, and proteins. Inorganic substances - water, mineral salts, and vitamins: the digestion in the mouth. Mouth (oral cavity) pharynx oesophagus stomach- small intestine- large intestine - anus: digestion. Mechanical phase food is crumbled into small bits moistened and dissolved in the secretion of the digestive glands. Chemical process - nutritions are broken down through chemical reactions with the aid of digestive enzymes contained in the secretions: digestion in the mouth. Teeth - solid structures located on the upper and the lower jaw. The last 4- wisdom teeth: salivary glands parotid, sublingual, submandular analyse - starts the chemical digestion, tongue - a muscle organ attached to the floor of the mouth. Forms a bolus by mixing the food with saliva.
