Digestive system

1. THE DIGESTIVE
SYSTEM

2. WHAT IS DIGESTIVE SYSTEM?

3. DIGESTIVE SYSTEM
- is responsible in digesting the food
that we eat in a process known as
digestion. It breaks down food
particles to organic compounds that
can be used by the cells in the body.

4. WAYS ON DIGESTING FOOD IN DIGESTIVES
SYSTEM
1. Mechanical Digestion – food is broken down into smaller pieces
through chewing, grinding, squeezing and tearing.
2. Chemical Digestion - food is broken down with the help of
chemicals and other substances to liquefy.

5. Parts of the Digestive System

6. Mouth
This is where digestion begins. Ingestion
happens when food is ingested or taken
in into the mouth. It is where the food is
broken down into smaller pieces by
chewing, tearing, and grinding the food
and changing the food physically.
SALIVARY GLAND produces
saliva.
SALIVA – is an enzyme that
speeds up the chemical reaction
of food.

7. ESOPHAGUS
Is muscular tube extending from the pharynx to
Stomach. Delivers the food to the stomach.
Once the food is being swallowed the process
becomes automatic (peristalsis) the brain signals the
esophagus to deliver the food to the stomach.
Peristalsis – wave-like contraction of muscle that
pushes the food to the stomach.

8. STOMACH
- A sac-like organ with strong muscular wall.
- Grinds and mix food.
- It secretes acids and powerful enzymes called
Hydrochloric acid that converts food into soupy
Or liquid substance called chyme.
- The stomach works for about four (4) hours then pushes the food
into the small intestine.

9. Small Intestine
• The duodenum is the first segment of the small intestine. It’s
largely responsible for the continuous breaking-down process.
• jejunum is responsible for absorbing fully digested carbohydrates and
proteins
• while ileum tends to absorb foods that are not absorbed in the jejunum
but they are mainly responsible for the absorption of nutrients
into the bloodstream.

10. LIVER
- It is the largest solid internal organ of the
body. This organ secretes bile which is a
green liquid that breaks up fats into smaller
droplets and serves as storage of nutrients. When bile is needed in
the small intestine it aids in digestion of fats but if not it is delivered
in the gall bladder.

11. PANCREASE
-- It is a small sac found in the digestive
system. This is a gland that is responsible
in converting the food to fuel the body cells.
It makes digestive juices each day during
digestion. Secretes digestive enzymes
into the duodenum that break down
protein, fats and carbohydrates.

12. GALBLADDER
-- It serves as storage and concentration of
bile. The bile is stored here until it will be
needed by the small intestine for digestion
of fats

13. LARGE INTESTINE
- Absorbs water and changes the wastes from
liquid to stool/feces.

14. RECTUM & ANUS
- Stores the stool /feces until it is out to your anus.