Fundamentals of Anatomy and Physiology

388 Chapter 16

Main

pancreatic duct^

Duodenum

Head of

pancreas

Figure 16- 10 The anatomy of the

pancreas.

Stomach

Pancreatic hormones (^)
Body of secreted into blood^
pancreas (^)
(^) Tail of (^)
pancreas (^)
(^) Endocrine portion (^)
of pancreas (^)
(Islets of Langerhans) (^)
The glandular portions (^)
of the pancreas are (^)
Duct cells grossly exaggerated^
secrete sodium Acinar cells (^)
bicarbonate secrete digestive (^)
solution into duct^ enzymes into duct^
Exocrine portion of pancreas
(acinar and duct cells)
(^) ®
Learning
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health Alert
Absorption in The Stomach
Some aspirins are marketed as “coated” to
delay their absorption until they reach the
intestine for individuals with sensitive stom-
achs. Alcohol is also absorbed through the
stomach. Hence, alcohol should not be con-
sumed when a person has not eaten. Eat-ing
food when drinking alcohol delays the speed
at which the alcohol is absorbed.
Common Disease, Disorder, or Condition
Ulcers
Ulcers occur when the hydrochloric acid and digestive enzymes erode the layers of the
stomach or duodenum. This is caused by either the excessive production of acid (which
can be caused by stress) or the inadequate production of the alkaline mucus that
protects the epithelial lining of the tract. Current research indicates that a bac-terium
Helicobacter pylori is associated with the development of stomach or peptic ulcers in
about 65% of ulcer cases. Antibiotics are administered to treat these ulcers. In the past,
antacids have been used to inhibit acid production by the parietal cells of the stomach.