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human_digestiv

human_digestiv - chemical digestion of fats proteins and...

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Human Digestive System
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Functions Ingest food Break down food Move through digestive tract Absorb digested food and water Eliminates waste materials
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Mouth Breaks down food into small pieces Begins starch digestion (amylase) Saliva produces amylase and lubricates food Moves food into esophagus Epiglottis covers trachea Peristalsis moves food to stomach
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Draw Tooth Structure Here Page 960
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Stomach First opening – cardiac sphincter Muscles churn food – more mechanical digestion. Glands produce gastric juice = pepsin + HCl Pepsin breaks down proteins (only at pH 2) Food leaves after 2-4 hrs Second opening – pyloric sphincter
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Small Intestine Digestion is finished here Peristalsis finishes mechanical digestion Pancreatic juice produces enzymes to finish
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Unformatted text preview: chemical digestion of fats, proteins and carbohydrates Question: What are the monomers for fats, proteins, and carbohydrates? Liver • Produces bile Question : What is the function of bile? Bile is stored in the gallbladder. Large Intestine • Absorbs water • Bacteria live here (produce methane) • Bacteria produce B vitamins and Vitamin K • Stores solid waste in rectum until elimination. Endocrine Glands Define endocrine gland here. • Pancreas – insulin = blood sugar • Thyroid – thyroxine = metabolic rates • Thyroid – calcitonin = blood calcium levels • Parathyroid – PTH = calcium, phosphorus absroption rates and helps make Vitamin D...
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