The Digestive System

Overview of the Digestive System

Digestive Tract:

Mouth, pharynx, and esophagus, stomach, small intestine, and large intestine (colon)

Accessory Organs:

Teeth, tongue, salivary glands, pancreas, liver, and gallbladder

Digestive system histology

Digestive system histology • • • • Identify: Mucosa Submucosa Muscularis Serosa or adventitia?

Adventitia or serosa?

Adventitia (connective tissue around organs superior to diaphragm) Serosa = visceral peritoneum

Digestive system histology

Oral Cavity

The Pharynx

• • • Nasopharynx Oropharynx Laryngopharynx

Salivary Glands

The Esophagus

Stomach

Stomach

Duodenum and Related Organs

Small Intestine – Gross Anatomy

• Three subdivisions: duodenum, jejunum, and ileum

Gross Anatomy of Large Intestine

• Cecum • Appendix • Ascending • Transverse • Descending • Sigmoid colon • Rectum • Anus

Pancreas and Gallbladder

Gallbladder

• Stores and concentrates bile • Expels bile into duodenum • Bile emulsifies fats

Visceral Surface of the Liver

Microscopic Anatomy of Liver

Mesenteries

• Superficial view of the abdominal organs

Mesenteries

• Greater omentum and transverse colon reflected

Mesenteries

• Sagittal section through the abdominopelvic cavity