SC.912.L SC.912.L.14.46

 What are the organs of the digestive system?  How is food digested?

Oral cavity with salivary glands esophagus pharynx stomach Large intestine Small intestine Liver and gall bladder pancreas

 Chemical and pressure receptors  Hormones  Autonomic nervous system  Central nervous system

 Salivary amylase secreted..digestion of starch and glycogen (polysaccharides) parotid submandibular sublingual

 Protein digestion begins here  Secretions: HCl and pepsinogen

 Neural..parasympathetic  Hormonal..gastrin  Histamine

3 ml. of chyme squirted out with each wave

 Main function absorption….ileum main site  Digestion of carbohydrates, fats and proteins occurs here

 Bile ◦ Emulsifies fats ◦ Facilitate cholesterol and fat absorption ◦ Keep cholesterol dissolved in bile  Pancreatic juice ◦ Proteases..digest protein ◦ Amylases..digest carbohydrates ◦ Lipases..digest fats ◦ Bicarbonate ions..neutralize acidity

 Water, electrolytes and nutrients absorbed  Active and passive transport mechanisms used  Absorption in simplest forms  Glucose and amino acids enter blood stream  Fat enters lymphatic system

 Main function absorption of water, and elimination of feces  Production of Vitamin K and B complex

 Divide your paper into 8 Frames. Draw a cartoon depicting the digestion of a hamburger.

 Make a set of study cards with a partner. Put the organ one side and the functions on the other. Be sure you can recognize both sides.

 Where were they digested?  How were they absorbed?  Carbohydrates  Proteins  Lipids  Water