What parts of the body do you use to bring in and digest food?
Parts of the body involved in bringing in and digesting food:
1. Mouth:
- Teeth: Break down food into smaller pieces through chewing.
- Tongue: Mixes food with saliva and aids in swallowing.
- Salivary glands: Produce saliva that begins the chemical digestion of carbohydrates.
2. Esophagus:
- Transports food from the mouth to the stomach through rhythmic muscle contractions called peristalsis.
3. Stomach:
- Secretes gastric juices containing hydrochloric acid and enzymes (e.g., pepsin) that further break down food and begin protein digestion.
- Churns and mixes the food to facilitate digestion.
4. Small Intestine:
- Receives partially digested food from the stomach.
- Pancreas secretes pancreatic juices, including enzymes (such as amylase, lipase, and proteases) that further break down carbohydrates, fats, and proteins.
- Bile, produced by the liver, emulsifies fats, making them easier to digest.
- The walls of the small intestine absorb the digested nutrients into the bloodstream.
5. Large Intestine (Colon):
- Absorbs water and electrolytes from the undigested material.
- Beneficial bacteria in the colon help break down certain dietary components and produce vitamins.
- Stores waste material and forms stools.
6. Rectum and Anus:
- The rectum stores solid waste until it is expelled through the anus during defecation.