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| to break down food into its component molecules, absorb nutriends into the bloodstream and then rid the body of undigestible material, poop |
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| (GI tract)a continuous muscular tube that winds throughout the body. It digests food (breaks it down into smaller molecules) and absorbs these into the blood. Includes the mouth, pharynx, esophagus, stomach, small and large intestines. |
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| The Accessory Digestive Organs |
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| teeth, tongue, gallbladder, salivary glands, liver, pancreas. Contribute to the breakdown of food |
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| introduction of food into stomach |
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| chewing, chemical digestio requires large surface area so breaking down large particles mechanically facilitates chemical diegestion |
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| 8 Funtions: Propulsion; Degultition |
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| 8 Funtions: Propulsion; Peristalsis |
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| moves material through digestive tract, a wave of circular smooth muscle relaxtion moves ahead of the bolus of food or chyme allowing the digestive tract to expand, then a wave of contraction of the circular smooth muscles behind the bolus of food or chyme propels it through the digestive tract; MASS MOVEMENTS: in large intestine |
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lubricate, liquefy, digest Mucus: secreted along entire digestive tract, lubricates food and lining, coats lining and protects from mechanical digestion, from acid and from digestive enzymes. Water: liquefaction makes food easier to digest and absorb
Bile: emulsifies fats
Enzymes: chemical digestion |
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| Movement from tract into circular or lymph |
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| waste products removed from body; feces, Defecation |
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| a mucosa lined cavity also called the oral or buccal cavity. The walls of the mouth are lined with stratified squamous epithelium that can withstand much friction. |
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