Stomach-Duodenum – The initial section of the small intestine is known as the duodenum. It lies between the stomach and the jejunum, the middle section of the small intestine.

Gall Bladder – The gallbladder is a component of the digestive system. Its primary purpose is to store bile. Bile is a substance that aids in the digestion of lipids. Bile is made up of cholesterol, bilirubin, and bile salts, among other things.

Human Esophagus – The esophagus is a muscular tube that connects the throat to the stomach (pharynx). The esophagus is around 8 inches length and coated with mucosa, a moist pink tissue.