How do the accessory organ aid digestion?

Answer 1

In addition to the alimentary canal, vertebrate digestive systems include the following accessory organs:

The liver secretes a substance called bile into the gallbladder, where it is stored for eventual use in digestion. Bile is a fluid mixture composed of bile pigment and bile salt. Bile pigment is a waste product resulting from destroyed red blood cells. Bile salt plays an important role in preparing fats for digestion.

The gallbladder stores and concentrates bile secreted by the liver. Fatty food in the small intestine triggers contractions in the gallbladder, releasing bile into the bile duct, which transports it into the small intestine.

The pancreas produces a fluid mixture, called pancreatic juice, composed of digestive enzymes and a bicarbonate buffer, which balances the pH levels in the digestive tract. The pancreas secretes pancreatic juice containing digestive enzymes into the small intestine, where it is used to break down proteins, starches, and fats.