anatomy 24 - DIGESTIVE SYSTEM basic introductory purpose...

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DIGESTIVE SYSTEM - basic introductory o purpose: simply to acquire or extract nutrients out of whatever you ingested o where the respiratory is a rather simple system, digestive system is more complex o several processes involved: ingestion taking in through your oral cavity chewing / mastication swallowing digestion the chemical and physical/mechanical breakdown o chemical – secrete a whole bunch of enzymes o mechanical – caused by muscular contraction purpose: to absorb the nutrients that were in the material that you ingested defecation elimination of unusable material (feces) - 26.1 overview of digestive system components o Digestive system is basically a tube with two ends. The tube is structurally modified into components o Gastrointestinal tract (modified tube) In average adult is about 20 feet long Oral cavity Pharynx Nothing more than a muscular funnel Esophagus Stomach Small intestine Large intestine Rectum Anus o
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  • Spring '09
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  • Anatomy, Digestive System, Large intestine, 20 feet

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