As you click on the diagram, this window will scroll to the section on the clicked organ to find out what digestive chemicals* it secretes!

Happy clicking!


Mouth:

amylase:  it is in saliva and helps to break down carbohydrates.  It is secreted by the salivary glands, though... not really by the mouth.  The salivary glands secrete the amylase (in saliva) into ducts which open to the surface in the mouth.


Pharynx:

nothing!  The pharynx only leads into the esophagus.


Esophagus:

nothing!  The esophagus is only a path into the abdomen... it moves food, but doesn't secrete any digestive chemicals.


Stomach:

Gastric Juice:  This is a mixture of chemicals, but not all of them are chemicals that cause digestive breakdown of food molecules.  Here are some of the important, digestive chemicals:


Pancreas:

Pancreatic juice:  This is a mixture of these important digestive chemicals--

Important note:  If you look through the list of digestive enzymes secreted by the pancreas, you will see at least one for each and every type of macromolecule (protein, lipid, carbohydrate, nucleic acid).  This is the only digestive organ that secretes such a wide variety of digestive chemicals.


Liver:

    The only secretions that the liver makes for digestion are within bile.  The liver produces the bile salts that are important for emulsifcation of chyme.  All of the rest of the description of the liver in your book is about liver anatomy and the effect the liver has on metabolism.   On the digestive regions webpage I have given you all I expect you to know now about the liver, and we will do more with it (the metabolism portion) in our next unit.


Gallbladder:

    The gallbladder releases the concentrated bile, of which only the bile salts are important chemicals for digestion, as described for the liver.


Small Intestines:

    Below you will find a list of digestive enzymes made by cells in the small intestines.  However, these digestive enzymes are not released into the chyme... instead, they remain embedded in the microvilli on the apical surface of the intestinal epithelium.  In this location they are available to interact with the chyme, and break it down more before endocytosis.


Large Intestines:

Nothing!  The large intestines do not produce any digestive enzymes.  Remember, the large intestines are concerned with resorption (and some absorption), and just make lots of mucus.


* Please note that all of these regions secrete mucus, but that is not a digestive chemical!