The human digestive system begins with ingestion of food through the mouth. The teeth grind the food into smaller pieces as saliva moistens it. The tongue then pushes the food into the pharynx. The pharynx transports the food into the esophagus, which carries the food into the stomach. The stomach stores and breaks down food using acids and enzymes. Nutrients are then absorbed through the small intestine before waste is passed into the large intestine, rectum, and out of the body.

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.