Here's a breakdown:

1. Mouth: Digestion begins here with chewing and saliva breaking down food.

2. Esophagus: Food travels down this tube to the stomach.

3. Stomach: Food is churned and mixed with gastric juices, further breaking it down.

4. Small Intestine: This is the primary site of nutrient absorption. The small intestine has tiny finger-like projections called villi, which increase surface area for efficient absorption.

5. Large Intestine: This part absorbs water and electrolytes, forming feces.

While the mouth, esophagus, and stomach play a role in preparing food for digestion, the small intestine is where the majority of nutrients are absorbed into the bloodstream.

It's important to remember that certain nutrients, like water, can also be absorbed through other routes, like the skin. However, the digestive system, particularly the small intestine, is the main route for nutrient entry into the body.