Which of the following parts of the digestive system are not parts of the digestive tract – that is, food does not pass through them?

To answer your question, let’s clarify the anatomy and function of the digestive system. The digestive system consists of the digestive tract (or alimentary canal) and the accessory organs.

1. Digestive Tract: This includes organs through which food passes, starting from the mouth and going all the way to the anus. The primary components are:

   • Mouth
   • Pharynx
   • Esophagus
   • Stomach
   • Small intestine
   • Large intestine
   • Rectum
   • Anus

2. Accessory Organs: These are vital for digestion but food does not pass through them. These include:

   • Salivary glands
   • Liver
   • Gallbladder
   • Pancreas

In summary, the parts of the digestive system that are not part of the digestive tract, meaning that food does not pass through them, include the salivary glands, liver, gallbladder, and pancreas. These organs support the digestive process through the secretion of enzymes, bile, and other substances essential for digestion.