What are the major parts in digestive system?

The major parts of the digestive system are:

1. Mouth: The mouth is the first part of the digestive system where food enters. It contains the teeth, tongue, and salivary glands. The teeth break down food into smaller pieces, while the tongue helps to mix the food with saliva and move it around. Saliva also contains enzymes that begin the process of breaking down carbohydrates.

2. Esophagus: The esophagus is a muscular tube that connects the mouth to the stomach. It carries food down to the stomach by means of waves of muscular contractions called peristalsis.

3. Stomach: The stomach is a J-shaped organ that secretes gastric juices and churns food to break it down into a semi-liquid substance called chyme. Gastric juices contain hydrochloric acid and pepsin, which help to break down proteins.

4. Small Intestine: The small intestine is a long, coiled tube that is the primary site of nutrient absorption. It is lined with villi, which are small finger-like projections that increase the surface area for absorption. The small intestine also produces enzymes that help to break down carbohydrates, proteins, and fats.

5. Large Intestine: The large intestine is a shorter, wider tube that is responsible for absorbing water and electrolytes from the chyme, as well as forming and storing feces. It contains beneficial bacteria that help to break down certain indigestible substances.

6. Rectum: The rectum is the final part of the large intestine and stores feces until it is eliminated through the anus.

7. Anus: The anus is the opening at the end of the digestive tract through which feces is expelled from the body.