BPK 110 Lecture Notes - Gastric Acid, Gastric Glands, Pylorus

• School: Simon Fraser University
• Department: Biomedical Physio & Kines
• Course: BPK 110
• Professor: Gina Whitaker

Document Summary

Kin110 chapter 3 digestion: from meals to molecules. The digestive system-the organ system that is primarily responsible for the digestion and for the absorption of nutrients into the body. Made up of the gastrointestinal (gi) tract (mouth to anus) and accessory organs (salivary glands, pancreas, liver, gallbladder) The inside tube of the gi tract is the lumen. There are four tissue layers that make up the wall of the gi tract. Contraction layers of smooth muscles (which we do not have voluntary control)-helps mix food, break it into small particles, and propel it through the digestive tract. Connective tissue-contains nerves and blood vessels that provides support, nourishes the mucosa, and sends nerve signals that control secretions and muscle contractions. The mucosa which lines the gi tract is a type of epithelial tissue. Nutrients must pass through before they can reach the blood or lymph. Transport-moving food down the esophagus and into the stomach.