the digestive system. overview of the digestive system digestive tract: mouth, pharynx, and...

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