Digestive system anatomy: Bio 201
Alimentary canal and accessory organs:
Identify all structures/organs on Figure 27.1. You should also be able to identify all of these on the human torso models,
EXCEPT the anal canal, anus. Also, you will not be able to differentiate between the three segments of the small intestine
(duodenum, jejunum, ilium). Just knowing where the small intestine is will suffice.
On Figure 27.2, you should know the following structures listed. This figure describes the general histological organization
of the alimentary canal.



Mucosa
o Epithelium
o Lamina propria
o Muscularis mucosae
Submucosa
Muscularis mucosa

o Inner circular muscle
o Outer longitudinal muscle
Intrinsic nerve plexuses
o Myenteric nerve plexus
o Submucosal nerve plexus
Submucosal glands




Lips
Superior labial frenulum
Inferior labial frenulum
Lingual frenulum

On Figures 27.3, 27.4 you should be able to identify:





Gingivae
Palatine raphae
Hard palate
Soft palate
Uvula
On Figure 27.5 (a), as well as on the torso models, you should be able to identify the following structures of the stomach:
 Greater curvature
 Cardiac region
 Lesser curvature
 Pyloric sphincter
 Body
 Rugae
 Fundus
On Figure 27.10, as well as on the torso models, you should be able to identify the following parts of the large intestine
(a.k.a., colon) :
 Ascending colon

 Appendix (Figure only)

 Transverse colon

 Descending colon

 Cecum
 Iliocecal valve
On Figure 27.13 as well as on the torso models, you should be able to identify:




Teniae coli
Sigmoid colon
Rectum
Anus
Parotid gland
Parotid duct
Submandibular gland
Sublingual gland
NOTE: Be sure to read all information on pages 455-459, 463 (small intestine), 465-466 (large intestine), 467 (salivary
glands), 469 (pancreas, liver/gall bladder)