BIOLOGY 105 Chapter Notes - Fall 2018 Chapter 4 - Caffeine, Ileum, Diverticulitis

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Chapter 4: digestion: summarize the body"s organization from cells to organ systems, cells are the smallest functional unit of living organisms. Most common type of cell: enterocyte: found in the lining of the small intestine: tissues are a collection of cells that have a similar origin. The lining of the small intestine contains several different types of epithelial cells, each in a different color: organs are an assembly of cells of different tissue types. The small intestine is just one of many organs that make up the gi system: explain the four main functions of the gastrointestinal (gi) tract. Ingestion: taking food into the body: digestion: food is mechanically and chemically broken down into absorbable units, excretion: undigested material in our diet and other waste products are eliminated from the body. They pass into the bloodstream or lymphatic system, which transports them throughout the body.

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