digestive system organs involved. mouth n oral cavity n food enters – ingested n roof, walls,...
TRANSCRIPT
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Digestive System
Organs Involved
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Mouth Oral Cavity Food enters – Ingested Roof, Walls, Floor
• Mucous Membrane Physical & Chemical
Breakdown of food
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Teeth Physical
Breakdown of Food
Mastication 2 years old – 20 17 to 24 – 32
4 Types• Incisors• Canines• Premolars• Molars
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Tongue Muscle
• Moves food around in mouth
• Bolus Frenulum
• Connects tongue to floor
Sensory Small
Elevations• Papillae
–Salt–Sour–Sweet–Bitter
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Salivary Glands Produce Saliva Chemical Breakdown
• Salivary Amylase• Carbohydrates
3 Pair
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Pharynx Tube Smooth muscle Mucous Membrane Back of mouth
• Connects with Respiratory
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Esophagus Tube Smooth Muscle Connects Pharynx to
Stomach About 25 cm long
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Know these Parts Nasopharynx Esophagus Tongue Molars Parotid Salivary
Gland Oropharynx Epiglottis
Laryngopharynx Submandibular
Salivary Gland Sublingual Salivary
Gland Incisors
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Know these terms Ingestion Digestion Physical Breakdown Chemical Breakdown
Chyme Bolus Mastication Peristalsis Salivary Amylase HCl
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STOMACH Smooth Muscle
• Mechanical Breakdown–Peristalsis
Gastric Glands• Chemical Breakdown
–Hydrochloric Acid & Enzymes
Chyme
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LIVERUnder DiaphragmLargest GlandProduces Bile
• Emulsifies Fat• Mechanical
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GALL BLADDERUnder LiverStores Bile
•Fat in Duodenum•Triggers hormone Cholecystokinin CCK
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PANCREAS Behind Stomach C Shaped Produces
• Pancreatic Juice• Most Important
–Digests ALL 3 foods• Insulin
–Blood Stream
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SMALL INTESTINE Twisted
• 7m long Smooth Muscle Intestinal Glands
• Digests Food Villi
• Increase Surface Area• Nutrients Diffuse into Blood
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Parts Duodenum
• Right after stomach• Pancreas & Liver Dump
Jejunum• Most Digestion
Ileum• Empties into Large Intestine
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LARGE INTESTINE Chyme to Fecal Matter Water & Salts Reabsorbed Bacteria
• Breakdown Cellulose• Produce Vitamin K• Some B Vitamins
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ASCENDING TRANSVERSE DESCENDING SIGMOID RECTUM
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APPENDIX Start Distal Ascending Colon Twisted Great spot for bacterial
growth
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