Which organ make up the digestive system?
The digestive system is a group of organs that work together to convert food into energy and basic building blocks for cells. The main organs of the digestive system are:
- Mouth: The mouth is the entry point for food into the digestive system. It contains teeth, which break down food into smaller pieces, and saliva, which contains enzymes that begin the process of digestion.
- Esophagus: The esophagus is a muscular tube that connects the mouth to the stomach. It carries food down to the stomach by peristalsis, a series of involuntary muscle contractions.
- Stomach: The stomach is a J-shaped organ that secretes gastric juices, which contain hydrochloric acid and enzymes that further break down food. The muscles of the stomach churn and mix food, forming it into a semi-liquid substance called chyme.
- Small intestine: The small intestine is the longest part of the digestive system. It is responsible for most of the absorption of nutrients from food. The walls of the small intestine are lined with villi, small finger-like projections that increase the surface area for absorption. The small intestine also produces enzymes that break down carbohydrates, proteins, and fats.
- Large intestine (colon): The large intestine is responsible for absorbing water and electrolytes from food waste, forming solid stools. It also contains beneficial bacteria that help digest certain foods and produce vitamins.
- Rectum: The rectum is the final part of the digestive system. It stores stool until it is eliminated through the anus.