Midterm Exam Review Packet
Ch. 24
DIGESTIVE PROCESSES
1. Ingestion
2. Digestion (mechanical and chemical)
3. Motility (mixing and propulsion)
4. Secretion
5. Absorption
6. Defecation
, GI TRACT AND ACCESSORY DIGESTIVE STRUCTURES
BE ABLE TO IDENTIFY EACH ORGAN ON THE IMAGE ABOVE.
GI TRACT INNERVATION
Autonomic NS
o Parasympathetic NV (enhances digestion)
o Sympathetic NV (inhibits or slows down digestion)
Enteric Nervous System
o Submucosal plexus
o Myenteric plexus
, Be able to identify all parts of the GI tract
What are the histological significances of the GI tract?
The GI tract consist of 4 layers:
Mucosa- Divides into 3 layers
Epithelium – Surface Epithelium
Lamina Propria – Connective Tissue
Muscularis Mucosae – Smooth Muscle
Submucosa- Areolar Connective Tissue
Muscularis- In all GI tract organs except the stomach
Serosa