The organ that secretes digestive juices into the small intestine is the pancreas.

The pancreas is an organ located in the abdomen, behind the stomach. It plays a crucial role in the digestive system by producing and releasing digestive enzymes into the small intestine. These enzymes help break down carbohydrates, proteins, and fats in the food we eat, making it easier for our bodies to absorb nutrients.

The pancreas produces several digestive enzymes, including:

1. Amylase: This enzyme helps break down carbohydrates, such as starches and sugars, into smaller molecules like glucose.

2. Protease: Protease enzymes break down proteins into amino acids, which are essential for building and repairing tissues in our bodies.

3. Lipase: Lipase enzymes break down fats into fatty acids and glycerol, which can be absorbed by the body.

These digestive enzymes are released from the pancreas into the small intestine through a duct called the pancreatic duct. The small intestine is the primary site for digestion and absorption of nutrients in the digestive system.

In addition to digestive enzymes, the pancreas also produces and releases bicarbonate into the small intestine. Bicarbonate is a base that helps neutralize the acidic stomach contents as they enter the small intestine. This is important because the enzymes produced by the pancreas work best in a slightly alkaline environment.

Overall, the pancreas plays a vital role in the digestion and absorption of nutrients. Without the secretion of digestive enzymes from the pancreas, our bodies would struggle to break down and absorb the nutrients from the food we eat.