Exercise 38 Digestive System Anatomy Functions of the

Exercise 38 Digestive System Anatomy

Functions of the Digestive System • • Ingest food Digest food Absorb nutrients Eliminate indigestible waste

Digestive anatomy overview

Organization of the Digestive organs Alimentary Canal Ø Mouth Ø Pharynx Ø Esophagus Ø Stomach Ø Small intestine Ø Large intestine Ø Anus Accessory organs Ø Teeth Ø Tongue Ø Salivary glands Ø Gall bladder Ø Liver Ø Pancreas

The Digestive Process ØIngestion ØPropulsion ØMechanical Digestion ØChemical Digestion ØAbsorption ØDefecation

This is your basic alimentary tract structure.

The oral cavity and pharynx

Say “ahhh”…

Salivary glands

The Stomach

Gastroesophageal junction Esophagus Stomach Stratified squamous epithelium Simple columnar epithelium

Gastric histology

The peritoneum

Daddy, what does “retroperitoneal” mean?

Location of mesentary: The lesser omentum

Location of mesentary: The greater omentum

Histology of the small intestine Adaptation for absorption

Goblet cells Duodenal mucosa Crypts of Lieberkuhn! Duodenal glands Villi

You only find us here, In the duodenum! Brunner’s (duodenal) glands

Crypts of Lieberkuhn! Paneth cells

Anatomy of the large intestine

The Colon Look at all those goblet cells!

Human dental formula: Baby teeth

Human dental formula: Permanent teeth

Anatomy of a Tooth

Pancreas: Acinar cells

The Liver

The End