Digestive Glands



Salivary glands

Saliva is a watery substance located in the mouths of humans and animals, secreted by three pairs of salivary glands, parotid, submandibular and sublingual gland.
Functions of saliva:
  • It helps in lubricating the inner lining of the mouth making it easier for swallowing and speaking.
  • It acts as a solvent.
  • It helps in forming bolus.
  • Allows digestion of starch.


Structure of liver

  • The liver is divided into right and left lobes by falciform ligament.
  • The right lobe of the liver is further differentiated into right lobe proper, a quadrate lobe and a caudate lobe on the posterior surface.
  • Hepatic lobules containing hepatic cells are the structural and functional units of liver.
  • Each lobule is covered by a thin connective tissue sheath called the Glisson's capsule.


Extrenal structure of pancreas

  • The pancreas comprises of head, neck, body and tail.
  • The main pancreatic duct is formed from smaller ducts within the pancreas, which opens into hepatopancreatic ampulla.
  • An accessory duct is also present in pancreas which opens directly into the duodenum.


Bile juice.

Bile or gall is a dark green to yellowish brown fluid, produced by the liver of most vertebrates, that helps in the digestion of lipids in the small intestine. In humans, bile is produced in the liver and stored in the gallbladder.



The gallbladder is small sac-shaped organ present beneath the liver which stores bile secreted by the liver and before release in the small intestine.