Digestion is the process by which food is broken down into smaller components that can be absorbed and utilized by the body. This process involves both mechanical and chemical digestion, and it occurs in several stages:

Mouth: Digestion begins in the mouth where food is mechanically broken down by chewing and mixing with saliva, which contains enzymes that start the breakdown of carbohydrates.

Esophagus: The esophagus is a muscular tube that connects the mouth to the stomach. It uses rhythmic contractions, called peristalsis, to push food down to the stomach.

Stomach: In the stomach, food is mixed with stomach acid and digestive enzymes that break down proteins. The stomach also churns the food, further breaking it down mechanically.

Small intestine: The small intestine is where most of the chemical digestion and nutrient absorption takes place. Enzymes from the pancreas and small intestine break down carbohydrates, proteins, and fats, and the nutrients are absorbed into the bloodstream through the intestinal wall.

Large intestine: The large intestine absorbs water and electrolytes from the remaining indigestible food matter, and forms it into feces for elimination.

Overall, the digestive system plays a crucial role in providing the body with the nutrients it needs to function properly.