DIGESTIVE SYSTEM

1. Digestive system
Excretory system

2. • Syllabus:
• Digestive system, Anatomy of digestive
system, gastro-intestinal system, general
structure of alimentary canal ,gastric
secretion, pancreatic secretion, gartsic
mobility digestion/peristalsis, Gastrointestinal-
hormones.
• Excretory system, component organ and their
functions.

3. Digestive and excretory system
• The digestive system also works in parallel
with your excretory system (kidneys and
urination). While the digestive system collects
and removes undigested solids, the excretory
system filters compounds from the blood
stream and collects them in urine.

4. Digestive System

5. Exocrine/ductless-in blood
indocrine/ductud
• Gastric secretion is stimulated by the act of
eating (cephalic phase) and the arrival of food in
the stomach (gastric phase). Arrival of the food in
the intestine also controls gastric
secretion (intestinal phase). The secreted fluid
contains hydrochloric acid, pepsinogene, intrinsic
factor, bicarbonate, and mucus.
• Pancreatic juice is composed of two secretary
products critical to proper digestion: digestive
enzymes and bicarbonate. Pancreatic jiuce.

6. • Peristaltic waves occur for variable distances to cause the
chyme to move along the small intestine. The ileocecal
sphincter (between the ileum and cecum-beginning of the
large intestine) remains contracted most of the time.
• The gastrointestinal hormones can be divided into three
main groups based upon their chemical structure.
• Gastrin–cholecystokinin family: gastrin and
cholecystokinin.
• Secretin family: secretin, glucagon, vasoactive intestinal
peptide and gastric inhibitory peptide.
• Somatostatin family. Motilin family.

7. Gastrointestinal hormone

8. Excretory system