Digestive System Organs

Digestive System Organs

1. Mouth

   • Teeth
     • Incisors
       • Canine
         • Premolars
           • Molars
     • Crown
       • Root
     • Enamel
       • Dentin
         • Pulp
   • Tongue
     • Stratified Squamous
     • Papilla
       • Taste Buds
   • Salivary Glands
     • Parotid Gland
       • Below the ear
     • Submandibular Gland
       • Below the jaw
     • Sublingual Gland
       • Below the tongue

2. Pharynx

   • Nasopharynx
   • Oropharynx
   • Laryngopharynx

3. Esophagus

   • The tube that delivers the bolus from the mouth to the stomach.
     • Has a upper and lower sphincter.
       • Stratified squamous
         • Circular and Longitudinal muscles

4. Stomach

   • Cardia
   • Fundus
   • Body
   • Pyloris
   • Sphincters
     • 1. Lower Esophageal Sphincter/ Cardiac Sphincter
       • 2. Pyloric Sphincter
   • Rugae
     • The folds in the stomach.
   • Chyme
     • Bolus become Chyme in the stomach.
   • Gastric Pits
   • Goblet Cells
   • Parietal Cells
   • Chief Cells

5. Small Intestine

   • Duodenum
     • First part of the small intestine.
   • Ileum
     • Last part of the small intestine.
   • Jejunum
     • Second part of the small intestine.
   • Plicae Circulares
     • Folds of the small intestine surface.
   • Villi
     • Make up the Plicae Circulares.
   • Microvilli
     • Make up the Villi.
   • Peyers Patches
     • Lymph nodes that sit on the small intestine.
   • Brunner's Glands
   • Intestinal Crypts

6. Large Intestine

   • Colon (4 regions)
     • Cecum
       • Ascending Colon
         • Transverse Colon
           • Descending Colon
   • Rectum
     • Last part of the large intestine.
   • Anal Sphincter
     • Internal sphincter is made up of smooth muscle, so is involuntary.
       • External sphincter is made up of skeletal muscle, so is voluntary.
   • Appendix
     • An organ that collects bacteria.
   • Tenia Coli
     • Longitudinal bands of smooth muscle.
   • Haustra
     • One section of the large intestine.

7. Liver

   • Lobes (4)
     • Right Lobe
       • Left Lobe
         • Caudate Lobe
           • Quadrate Lobe
   • Hepatocytes
     • Liver cells
   • Kupffer Cells
   • Sinusoids
     • Spaces between Hepatocytes.
   • Hepatic Portal System
     • Vein
       • Atery
         • Bile Duct
   • Bile Canaliculi
     • Small vessels that carry bile in the liver.

8. Gall Bladder

   • Hold on to and ages bile.

9. Pancreas

   • Acini
     • Exocrine cells; secrete digestive enzymes and buffers.
   • Islets of Langerhans
     • Endocrine cells; secrete insulin and glucagon.