Digestuve system part two of 3rd quarter.pptx

LEARNING OBJECTIVES
Identify the organs that make up the digestive system;
At the end of the lesson, students should be able to:
Give the function of each organ;
Describe how some accessory organs and glands help the
body in the digestive process; and
Explain ingestion, digestion, absorption, assimilation, and
excretion.

DIGESTIVE SYSTEM
The organs that take in food and liquids and
break them down into substances that the body
can use for energy, growth, and tissue repair. Waste
products that body cannot use, leave the body
through bowel movements.

Organs that make up the
Digestive System
MOUTH
The mouth initiates digestion before eating,
with salivary glands activating. Food is
chewed into easier pieces, and saliva
breaks down into a digestible form. The
tongue then passes the food into the throat
and esophagus.

ESOPHAGUS
The esophagus, located near
the trachea, receives food
from the mouth through the
epiglottis, preventing
choking, and peristalsis, a
series of muscular
contractions.

STOMACH
The stomach, a hollow organ,
holds food and breaks it
down with enzymes. Cells
secrete acid and enzymes,
releasing contents into the
small intestine after
processing.

The small intestine is an organ
that breaks down food further
into substances, such as
glucose, that can be absorbed
by the villi. It has three parts
namely the duodenum, the
jejunum, and ileum.
SMALL INTESTINE

This is where reabsorption of liquid,
electrolytes and some vitamins from
the undigested food takes place. It
secretes mucus to aid in the formation
of feces and maintains alkaline
conditions. This is the last segment of
the gastrointestinal tract that
completes absorption and compacts
waste.
LARGE INTESTINE

. The pancreas makes three different kinds
of enzymes namely amylase, peptidase,
and lipase released through a pancreatic
duct that aid in the digestion of all three
organic compounds such as carbohydrates,
proteins, and fats respectively.
PANCREAS

. The liver is a vital organ in the digestive
system, processing nutrients from the
small intestine, bile, fat, and vitamins. It
serves as the body's chemical factory,
detoxifying harmful chemicals and
secreting toxic drugs.
LIVER

. Gall bladder - a small pear-shaped
sac that can hold about 50ml of bile.
It stores and concentrates bile from
the liver, and then releases it into
the duodenum in the small intestine
to help absorb and digest fats.
GALL BLADDER

The rectum, an 8-inch chamber
connecting the colon to the anus,
receives stool and alerts the brain
about evacuation. Sensors send
messages to the brain, which
decides if rectal contents can be
released. If not, the rectum
contracts, temporarily easing
sensation.
RECTUM

The anus is the last part of the
digestive tract.
ANUS

ACTIVITY TIME!
Directions: Identify and name the
organs that are part of the digestive
system from among the picture in the
box shown in the next slide.

ASSIGNMENT
Search the five most important
processes in digestive system as
well as its function.
(1 WHOLE SHEET OF PAPER)

PROCESSES
HAPPENS IN
DIGESTIVE
SYSTEM

INGESTION
Ingestion involves taking food through the
mouth, with teeth, saliva, and tongue playing key
roles in mastication. Saliva enzymes chemically
process food, transforming it into a soft mass for
swallowing.

DIGESTION
Digestion is the process of breaking down food into
smaller, smaller organic fragments for absorption. It
involves breaking down complex proteins,
polysaccharides, and lipids into simpler sugars.
Different organs play specific roles in this process,
ensuring nutritional balance in animal diets.

ABSORPTION
This is when the body absorbs the molecules
from the food, taking them through the
intestine wall and into the blood where the
energy and building blocks can be delivered
throughout the body.

ASSIMILATION
Assimilation is the process of absorbing nutrients and
distributing them to the body. Assimilation starts in
the mouth as food moves down the throat through
the esophagus and into the stomach. From the
stomach, food enters the small intestine.

EXCRETION
Excretion is the process of removing
wastes and excess water from the
body.

1.What do you call by the process of breaking down food into smaller,
smaller organic fragments for absorption.
2.What organ in digestive system is located near the trachea that
receives food from the mouth?
3.What is the process of removing wastes and excess water from the
body?
4.This is when the body absorbs the molecules from the food, taking
them through the intestine wall and into the blood where the energy
and building blocks can be delivered throughout the body.
5.What is the organ that breaks down food further into substances,
such as glucose, that can be absorbed by the villi?
6.What is the system that makes food absorbable into the body?
7.What is the process of absorbing nutrients and distributing them to
the body?
8.It is a small pear-shaped sac that can hold about 50ml of bile. What
organ is it?

Digestuve system part two of 3rd quarter.pptx

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Digestuve system part two of 3rd quarter.pptx