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Digestive System - PowerPoint PPT Presentation


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Digestive System. Trace the path of food…. Descending colon Esophagus Pyloric sphincter Ascending colon Transverse colon Sigmoid colon Anus Ileum Pharynx Cardiac sphincter Duodenum Stomach Rectum Cecum Soft palate Hard palate Jejunum. Trace the path of food…. Hard palate

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trace the path of food
Trace the path of food…
  • Descending colon
  • Esophagus
  • Pyloric sphincter
  • Ascending colon
  • Transverse colon
  • Sigmoid colon
  • Anus
  • Ileum
  • Pharynx
  • Cardiac sphincter
  • Duodenum
  • Stomach
  • Rectum
  • Cecum
  • Soft palate
  • Hard palate
  • Jejunum
trace the path of food1
Trace the path of food…
  • Hard palate
  • Soft palate
  • Pharynx
  • Esophagus
  • Cardiac sphincter
  • Stomach
  • Pyloric sphincter
  • Duodenum
  • Jejunum
  • Ileum
  • Cecum
  • Ascending colon
  • Transverse colon
  • Descending colon
  • Sigmoid colon
  • Rectum
  • Anus
do you know
Do you know…
  • Function of salivary glands?
  • What happens in stomach?
  • What happens in small intestine?
  • What happens in large intestine?
  • Function of liver?
  • Function of gall bladder?
  • Function of pancreas?
layers of the alimentary canal
Layers of the Alimentary Canal
  • Mucosa - epithelia
  • Submucosa – connective tissue
  • Muscularisexterna – layers
  • Serosa – peritoneum
    • Visceral
    • Parietal
    • Connected by mesentery
the oral cavity
The Oral Cavity
  • Palate
    • hard
    • Soft
  • Uvula
  • Teeth
    • Incisors
    • Canines
    • Molars
  • Salivary glands
esophagus
Esophagus
  • Peristalsis
  • Cardiac sphincter
    • “Loose” closure
    • Relies on diaphragm to help close
    • GERD
    • Hiatal hernia
    • Squid “fun fact”!
day 2
Day 2
  • Digestive system concept map
  • Notes
  • Pig day 3
stomach
Stomach
  • Three layers of muscle
  • Lining
    • SCE
    • Gastric pits
      • Mucous neck cells
    • Gastric glands
      • Parietal cells – HCl
      • Chief cells – pepsin
      • Enteroendocrine cells - gastrin
small intestine
Small Intestine
  • Lining
    • Villi
      • Capillary bed
      • Lymph vessel
    • Crypts of Lieberkuhn
  • Enzymes from pancreas, liver
  • Chemical digestion, water absorption
accessory organs1
Accessory Organs
  • Liver
    • Makes bile
    • Nutrient conversion, other metabolic function
    • Detox
  • Gall bladder
    • Stores bile
      • Emulsifies fats
  • Pancreas
    • Pancreatic juices
chemical digestion
Chemical Digestion
  • Carbohydrates
    • Begins?
    • In stomach?
    • Amylase, brush border enzymes in SI
  • Fats
    • Emulsified by?
    • Lipase in SI
  • Proteins
    • Pepsin in stomach
    • Proteases, brush border enzymes in SI
disorders and diseases of the digestive system
Disorders and Diseases of the Digestive System
  • gingivitis and periodontal disease
    • plaque forms tarter
  • cardiovascular disease
  • gastroesophageal reflux disease
    • heartburn
  • ulcers
    • Helicobacter pylori
disorders and diseases of the digestive system1
Disorders and Diseases of the Digestive System
  • gastroenteritis
    • inflammation of stomach or intestine
  • inflammatory bowel disease
    • chronic inflammation
    • ulcerative colitis
    • Crohn’s disease
  • constipation and diarrhea
    • infrequent or too frequent defecation
disorders and diseases of the digestive system2
Disorders and Diseases of the Digestive System
  • hepatitis
    • inflammation of liver
  • pancreatitis
    • inflammation of pancreas
  • gallstones
    • bile forms crystals
    • cholecystectomy
  • cancer
    • digestive system cancers are common

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