What is the Difference Between Duodenum and Jejunum?

The duodenum and jejunum are two sections of the small intestine, which plays a crucial role in the digestion of food. They have different characteristics and functions:

Duodenum:

• Located at the beginning of the small intestine, just after the stomach.
• Measures about 10 inches long and forms a "C" shape around the pancreas.
• Receives bile from the liver and pancreatic enzymes from the pancreas to help break down and absorb fats.
• Neutralizes stomach acid before it reaches the rest of the small intestine.
• Contains Brunner's glands, which produce alkaline mucus to help neutralize stomach acid.

Jejunum:

• Located in the middle section of the small intestine, between the duodenum and ileum.
• Makes up a little less than half of the remaining small intestine length.
• Characterized by many blood vessels, giving it a deep red color.
• Primarily responsible for absorbing sugars, amino acids, and fatty acids.
• Does not have Brunner's glands, but has a similar histological structure to the duodenum.

In summary, the duodenum is responsible for receiving and neutralizing stomach acid, while the jejunum is mainly involved in absorbing nutrients such as sugars, amino acids, and fatty acids.

Comparative Table: Duodenum vs Jejunum

The duodenum and jejunum are two distinct segments of the small intestine. Here is a table summarizing their differences:

In summary, the duodenum is the shorter and more proximal segment of the small intestine, while the jejunum is the longer and more distal segment. The duodenum's primary function is to receive and mix digestive juices from the stomach, liver, and pancreas, while the jejunum is responsible for nutrient absorption and further digestion of food.