Digestive Structures

Goals the Section... Analyse how the structures of the digestive system work together Describe the components, pH, and digestive actions of salivary, gastric, pancreatic, and intestinal juices

DIGESTIVE STRUCTURES The 7m tube running from mouth to anus. Location of food entrance, nutrient absorption and waste excretion.

The Digestive System Lets start with the accessory organs LiverPancreas

Accessory Organs In fashion, is your outfit complete without accessories? What does this term mean in the digestive system? Answer: part of the digestive system but no food ever enter these structures Pancreas, Liver and...? Answer: salivary glands

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Pancreas Posterior to stomach Endocrine and Exocrine gland Produces Pancreatic Juice, Insulin and Glucagon Your Mission: – Create a chart with the heading Pancreatic Juice, Insulin, and Glucagon – Describe in your chart what each does, what cells in the pancreas make each and whether it is endocrine or exocrine substance

Pancreas - Exocrine Produces digestive juices called PANCREATIC JUICE – Made in zymogen cells which are connected to the pancreatic duct – Contains: Water, Sodium Bicarbonate, Lipase, Trypsinogen, Nucleases and Pancreatic Amylase

Pancreas - Endocrine Produces INSULIN and GLUCAGON in cells called islets of Langerhans – Hormones that regulate body’s use of glucose – Insulin – regulates cell’s ability to use glucose (along with the liver’s storage of glucose as glycogen) – Glucagon – allows liver to release glucose when blood levels drop

Liver Posterior to the diaphragm Large Generous blood supply 6 very important functions Your Mission: – List the 6 functions of the liver

Functions of the Liver Regulate glucose levels in the bloodProduce ureaDetoxify bloodProduce BileProduce different globulins (blood proteins)Break down old blood cells

To Summarize Thus Far... Enzymes play a crucial role in the digestion of food into absorbable unit molecules Two accessory organs, the liver and pancreas, are provide life sustaining functions although they never directly process food Next stop... The digestive tract!

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