digestion. functions of digestive system digestion - breaks down food absorption - absorbs nutrients...
TRANSCRIPT
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Functions of Digestive System
• Digestion - breaks down food
• Absorption - absorbs nutrients in blood
• Elimination - rids wastes from body
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Body parts (organs)• Mouth & Teeth – chews food; with the
addition of saliva, starts the breakdown of food
• Esophagus - muscles move the food down the esophagus; Pepsin
• Stomach - saclike organ enclosed in a muscular wall (3 layers thick); Chyme
• Small Intestine - (20-23 feet long and 1” in diameter)
– fingerlike villi absorb nutrients that are carried throughout the body by blood
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Organs (cont.)
• Large Intestine - (also called colon) – It is 5-6 feet and 2.5” in diameter – Absorbs water and eliminates undigested
food. – Water, vitamins, and mineral salts are
absorbed into the bloodstream in the colon.
• Pancreas and Liver - add secretions to break the food down further
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Care of Digestive system
• Eat variety of food
• Avoid fried food
• Eat high fiber foods
• Don’t hurry through meals
• Drink plenty of water
• Don’t drink carbonated beverages
• Don’t “stress eat”
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Problems • Indigestion - burning discomfort in upper
abdomen • Heartburn - burning pain in center of chest• Gas
• Nausea and vomiting - it’s the reverse of the digestion process
• Diarrhea - if food passes too quickly through the large intestine it cannot absorb enough water
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Problems (cont.)
• Constipation - Feces are dry and hard; bowel movements are difficult
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Recent FindingsBand AdjustmentIllustration of laparoscopic placement of LAP-BAND® around stomach. Adjusting the size of the opening between the two parts of the stomach controls how much food passes from the upper to the lower part of the stomach.
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Interactions with other Systems(a few mentioned below)
• Muscular – muscles push and move food throughout the system
• Circulatory/Cardiovascular – nutrients are absorbed throughout the digestive system and distributed through blood
• Urinary – helps to filter out waste• Immune – gastric juices help to kill
bacteria; nutrients in food helps our body fight off infection