body system

HUMAN BODY SYSTEMS

What is a SYSTEM?

A system is many parts
that work together to

do a function.







Human body is made up of MANY DIFFERENT SYSTEMS.
The systems all work together to help the body to function.

The systems are:

Digestive system Breathing system Transport system

The systems are:

Nervous system Muscular system Skeletal system

SKELETAL
SYSTEMS

The hard parts you feel are called BONES.

Skull

Rib cage Arm bone When all the bones are
Pelvis Spine together they are called

Leg bone SKELETON.

Functions:

1. to give body support.

2. to protects important organs in
your body.

By the time you're
an adult, you'll have

exactly
206 bones.

Skull Rib cage
Arm bone
Pelvis / Hip bone
Leg bone

MUSCULAR
SYSTEMS

The upper arm
has two main

muscles.

When you move your arm, the bones are pulled
by the muscles.

Muscle pulls
the bone

Function:

for our movement
with the help of the

bones.

TRANSPORT
SYSTEM

The transport system is made up of several parts.
The main organs are:

heart Blood vessels Blood

Function:
Pump blood to all parts of

the body.

The blood contains OXYGEN
that your body needs.

A doctor use the stethoscope to

listen to your heart beat.

The heart is the busiest muscle beating 72
every minute - about 2.5 billion times
during a lifetime.

BREATHING
SYSTEM

The air around us contain oxygen and other
gases.

oxygen

Carbon dioxide

The breathing system is made up of several parts.

nose The function of the
mouth breathing system is
windpipe to give oxygen to
lungs
our blood.

When you breathe in, oxygen
enters the nose and mouth.

It then moves down a tube
called windpipe.

From the windpipe down to
your lungs.

Carbon dioxide gas is removed from
our body when we breathe out.



The right lung is slightly larger than the left lung.

Smoking Damages Your Lungs

Do you smoke?
If you smoke this is what
your lungs will look like.

If you don't smoke this is
what your lungs will look
like.

NERVOUS
SYSTEM

The nervous system is made up of several parts.
The main organs are:

brain Spinal cord nerves

Function:
To control your body.

It controls your sense of
smell, taste, hear, sight, think

and dream.

The brain

The brain is the
centre of the

nervous system.

The spinal cord
The spinal cord is
where messages
from the body
travel to the brain.

The nerves

The nerves ‘read’ and
‘feel’ the SENSES of
your body and send
the message through
the spinal cord to the
brain.

Lack of oxygen in the brain for 5 to 10
minutes results in permanent brain
damage.

DIGESTIVE
SYSTEM

We get energy from the food that we eat.

In order to get the energy from food, the food must be
broken down into smaller pieces.

How small the food need to be broken down?
HOW SMALL?

Until it is small enough to be absorbed into
the blood.

Smaller than the salt

mouth The digestive
gullet system is made up
of several parts.
Stomach

Small
intestine

Large
intestine

mouth The process of
breaking food from
Small the mouth to the
intestine
small intestine is
called

DIGESTION.

MOUTH GULLET STOMACH SMALL INTESTINE

REMEMBER!!!
The breaking of food mostly happens in the

small intestine.

Food that are not digested passes through the large intestine.
The undigested food is called faeces.

The feaces are then stored
in the rectum.

The feaces exit the body
through the anus.

rectum

anus

On average, the human male adult small
intestine is 6.9 metre long and the female is

7.1 metre.

The large intestine is approximately 1.5 metre long.