Presentation on theme: "Digestive System. Essential Question How does the digestive system promote homeostasis in the body."— Presentation transcript:
Essential Question How does the digestive system promote homeostasis in the body
Functions 1. Physically and chemically breaks down food into smaller pieces. 2. Moves digested food from the digestive tract into the circulatory system through the process of absorption. 3. Eliminates undigested food and waste products from the body.
Structure #NameDescription and Function 1Mouthcontains teeth, which break down food into smaller pieces by chewing, which allows food to be swallowed. 2epiglottisThis trap door belongs to both the respiratory and the digestive systems. Prevents food and fluids from draining into the lungs.
Structure #NameDescription and Function 3LiverThe organ secretes bile that is passed along the gall bladder for concentration and storage. 4 Gall bladder Stores and concentrates bile, and then releases it into to the duodenum to help absorb and digest fats.
Structure #NameDescription and Function 5Bile ductThe duct collects bile from the liver and the gall bladder as it passes along to the duodenum of the small bowel. 6Large Intestine The large intestine passes the remaining essential nutrients into the bloodstream and the storage and elimination of waste left-over.
Structure #NameDescription and Function 7Appendix proposed to be a vestigial structure, (a structure that has lost all or most of its original function through the process of evolution.) Current theory suggest that it is part of the immune system, it exposes the body to antigens and manufactures hormones during fetal development. 8Salivary gland 3 main salivary glands deliver saliva into the mouth. The fluid helps soften up food, the first chemical action along the digestion trail.
Structure #NameDescription and Function 9TongueMuscle that is used for rolling food around your mouth so your teeth can work best. 10EsophagusCarries food, liquids, and saliva from the mouth to the stomach through muscular contractions called peristalsis.
Structure #NameDescription and Function 11StomachGastric acids in this organ break down food. (Chemical digestion) 12DuodenumThe first section of the twenty two food long small intestine. It is largely responsible for the continuing food breaking-down process.
Structure #NameDescription and Function 13PancreasThe body’s sugar control board. Both insulin and glucagon are produced here. It secretes digestive enzymes that break down protein, fat, and carbohydrates.
Structure #NameDescription and Function 14Small Intestine The small bowel has 3 main sections: the duodenum, jejunum, and ileum. The duodenum breaks down food into liquid form and the jejunum and ileum absorb nutrients into the bloodstream. 15RectumStores and releases waste and stool.