Chapter 24: The Digestive System

The gastrointestinal (GI) or digestive system digests food and transports (absorbs) nutrients (including salts and water) into the blood. Digestion involves breaking down foods both chemically and mechanically into smaller components that can be transported (absorbed) through the digestive tract wall (epithelium) and into the blood (most breakdown products) or lymph (for fat breakdown products). ................
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