Human Digestive System
- 1. HUMAN DIGESTIVE SYSTEM Arif Fahmi
- 3. MOUTH • Food starts its journey from the mouth or coral cavity. • There are many other organs that contribute to the digestion process, including: • Teeth • Salivary glands • Tounge • Teeth are designed to for grinding food particles into small pieces and moistened with saliva before the tounge pushes the food into pharynx.
- 4. PHARYNX • A fibromuscular y-shaped tube attached to the terminal end of the mouth. • It is mainly involve in the passage of chewed/crushed food from the mouth through the oesophagus. • It also has a major part in the respiratory system, as air travels through the pharynx from the nasal cavity on its way to the lungs.
- 5. OESOPHAGUS • This is a muscular tube that connects the pharynx, which is a part of an upper section of the gastrointestinal tract. It supplies swallowed food along with its length.
- 6. STOMACH • It serves as a muscular bag which is situated towards the left side of the abdominal cavity, beneath the diaphragm. • This vital organ acts as a storage for the food and provides enough time to digest meals. • The stomach also produces digestive enzymes and hydrochloric acid that maintains the process of digestion.
- 7. • Mucus: It is a protective barrier to stomach acid, bile salts, pancreatic enzymes, macromolecules. The mucus lining your stomach helps prevent your stomach from the negative effects of excessive exposure to acid or pepsin. • Pepsin : Break down proteins STOMACH
- 8. • Hydrochloric acid: Main component of the gastric juices an it maintans the stomach pH of 1 to 2. STOMACH
- 9. SMALL INTESTINE • A thin long tube for about 10 feet long and a part of the lower gastrointestinal tract. • It is present just behind the stomach and acquires a maximum area of the abdominal cavity. • The complete small intestine is coiled and the inner surface consists of folds and ridges.
- 10. LARGE INTESTINE • A slurry of digested food, known as chyme, enters the large intestine from the small intestine via the ileocecal sphincter. • Large intestine converting food into feces, absorbing essential vitamins produced by gut bacteria, and reclaiming water from feces.
- 11. RECTUM • Rectum holds the feces until you push it out of the body, through the anal canal, by having a bowel movement.