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BIOL 204 Lab For Week 11 Digestive System Anatomy
Microscopic Anatomy of the GI Tract
The GI tract consists of a tube that extends from the mouth to the anus. It
has four tissue layers (tunics):
Another, detailed view of GI tract tunics
There are structural modifications of the tunics in various
areas of the GI tract
Gross Anatomy of the GI Tract
The GI Tract: Mouth
Extrinsic Salivary Glands
Types of Permanent Teeth
Each jaw has:
2 central incisors
2 lateral incisors
2 canines (eyeteeth)
4 premolars
6 molars
Internal Anatomy
of a Tooth
The Esophagus
Gastroesophageal Junction
Gastric pit
The Stomach
Microscopic anatomy of the stomach.
Small Intestine Gross Anatomy
Histology of the Small Intestine
(Duodenum)
Intestinal Villus
The Liver
Gross View
of the
Liver
The Duodenum of the Small Intestine Receives the
Ducts of the Liver, Gall Bladder and Pancreas
Liver Microscopic Anatomy
Pancreas Gross Anatomy
Microscopic View of the Pancreas:
Islet Cells: endocrine; secrete insulin and glucagon
Acinar Cells: exocrine; secrete digestive enzymes
Portions of the Large Intestine
Mesenteries of the abdominal digestive organs.
1. Diaphragm
2. Liver – left lobe
3. Falciform Ligament
4. Liver right lobe
5. Stomach
6. Greater Omentum
7. Ascending Colon
8. Cecum
9. Small Intestine
10. Descending Colon
11. Sigmoid Colon
An Appendix, Unfixed
Gall Bladder on the Underside of
the Liver
Liver – Gross View
Serosal Surface
Human Duodenum, Unfixed
Cat Dissection
1. Parotid Gland
2. Sublingual
Gland
3. Submandibular
Gland
4. Esophagus
5. Tongue
6. Masseter
Muscle
7. Larynx
8. Trachea
Cat
Dissection
Abdomen
1.
2.
3.
4.
5.
6.
Diaphragm
Round Ligament
Falciform Ligament
Left Lateral Lobe of Liver
Left Medial Lobe of Liver
Quadrate Lobe of Liver
7.
8.
9.
10.
11.
Right Medial Lobe of Liver
Right Lateral Lobe of Liver
Gall Bladder
Spleen
Greater Omentum
Cat Abdomen – Greater Omentum Removed
1.
2.
3.
4.
5.
6.
7.
Cardiac Stomach
Fundic Stomach
Stomach Body
Pyloric Stomach
Lesser Omentum
Duodenum
Pancreas (Ventral)
8.
9.
10.
11.
12.
13.
14.
Ascending Colon
Ileum
Jejunum
Sigmoid Colon
Spleen
Gastrospleenic Ligament
Bladder
Small and Large
Intestine
Removed
1.
2.
3.
4.
5.
Small Intestine
THE Mesentary
Ileum
Cecum
Ascending Colon
6.
7.
8.
9.
10.
Transverse Colon
Descending Colon
Sigmoid Colon
Mesocolon
Greater Omentum
Gall Bladder and Lobes of the Liver