The salivary glands of the digestive tract… (Day 169)

Histology of the anal sac and anal glands

Today’s Diary Entry is sponsored by Find Pet Boarding

Through the past semester I’ve come to realise that though the subjects are taught seperately that they are intrinsically linked. We’ve just finished the function of the digestive system in physiology and are now looking at the digestive system in anatomy and in histology. In addition to which we are also looking at animal nutrition. Today we started with looking at the salivary glands of the mouth which not only product enzymes to help start the digestion of food but help the movement of food along the digestive tract. These are located in the base and roof of the mouth along with the cheek and on the surface of the tongue.

The glandular stomach then also secretes mucus and digestive enzymes along with “gastric juice” to help the digestion of food. Then entering the top of the small intestine with the duodenum you have the entrances of the pancreatic and hepatic (liver) ducts which add more digestive power to the mix.

We finished today looking at the rectum and anus including the histology of the anal sacs (which contain the anal glands) in the dog which as vets we have the pleasure of expressing. For something that can contain so much foul smelling liquid these glands are extremely small under the microscope!

Histology of the anal sac and anal glands
The anal sac with the anal glands in the purple area.

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