Flashcards in GASTROINTESTINAL SYSTEM Deck (55)
What are the two types of Digestion?
Mechanical and Chemical Digestion
Describe Mechanical Digestion.
Tongue, teeth, stomach, and sm. intestine mix/cut/churn food
Describe Chemical Digestion.
Enzymes secreted from salivary glands, tongue, stomach, pancreas, and sm. intestine breakdown nutrients
Where is the Parotid Gland located?
Inferior-anterior to ear. Between skin and masseter.
Where is the Submandibular Glands located?
Floor of mouth
Where is the Sublingual Glands located?
What is Bolus?
Soft, flexible mass (chewed food)
Describe the function of the Pharynx (Throat)?
Contractions moves bolus from mouth, to pharynx, to esophagus
Describe the structure and function of Esophagus.
Collapsible tube running from pharynx, through diaphragm, to stomach. - secrets mucous and moves bolus
What is the 'Esophageal Hiatus'?
A hole in the Diaphragm where the Esophagus runs through
Wave-like contractions moving bolus from esophagus to anus
What are the structures controlling food passage in the Upper Esophageal Sphincter?
Pharynx into Esophagus
What are the structures controlling food passage in the Lower Esophageal Sphincter?
Esophagus into Stomach
The GI Tract extend from ____________ to __________.
Lower Esophagus to Anal Canal
List the layers of the GI Tract walls. (deep to superficial)
Describe the Mucosa layer of GI Tract.
Mucous membrane consisting of:
- Epithelium (secrets)
- Lamina Propria (absorbs)
- Muscularis Musoca (contraction)
Describe the Submucosa layer of GI Tract.
- Nutrient transport with blood/lymph vessels
- GI control from Enteric N.S
Describe the Muscularis layer of GI Tract.
Contain Circular and Longitudinal Fibres causing contractions controlled by Enteric N.S
Describe the Serosa/Visceral Peritoneum layer of GI Tract.
Outermost layer of organs in abdominal cavity
Describe the Peritoneum.
Large folds that bind organs to one another and to the walls of the abdominal cavity
What are the two layers of Peritoneum?
- Visceral Peritoneum/Serosa
- Parietal Layer
What is the space in between the Peritoneum layers?
What are Retroperitoneal?
Peritoneum layer covering organs on the anterior side
Where is the Stomach located?
Below Diaphagrm - Runs from esophagus to sm.intestine
Soupy mix of food in the stomach