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Human Organ Systems (Lesson 2)
1. Human Systems
-Like plants, animals have different parts
or organs to carry out different jobs.
-Organs allow animals to detect and
respond to changes around them.
-An organ is a part of a living body that
performs certain important functions.
- Examples of organs are : eyes, nose,
ears, tongue, skin
2. Organs of a Human
The organs in our body
form systems to allow life
processes like movement
and reproduction. Our
body has various organ
systems. Each system
performs its own function
but they all work together
to keep us alive.
Examples of human organ systems
3. Human Organ Systems
Muscular Circulatory
System System
Carries
Enables food, water
movement and waste
materials to
& from
various parts
of the body.
4. Human Organ Systems
Skeletal Digestive
System System
Supports Breaks down
the body food into
and keeps simpler
it in substances
shape. for the body
to absorb.
5. Human Organ Systems
Respiratory System
For breathing- To
take in oxygen
needed by the
body and give out
unwanted carbon
dioxide from the
body to the air.
6. Digestive System
-The food we eat must be broken down
into simpler substances known as
nutrients.
-The process of breaking down food into
simpler substances is called digestion.
-Digestion is carried out by our digestive
system. It is a complex process and
involves more than one organ.
7. A journey through our
digestive system!
Mouth
Gullet
Anus
(Oesophagus)
Stomach Rectum
Small Large
intestines intestines
8. Skeletal System
-The bones in our body connect and form the
skeleton.
- Our skeleton gives our body shape,
supports our body and protects important
organs in our body.
-The backbone supports our body.
-The ribcage protects our lungs and heart.
-The skull protects our brain and eyes.
10. Skeletal System
The place where
2 or more bones
are connected is
called a joint.
Can you name
some joints?
11. Muscular System
- Our bones can move at the joints, but they
cannot move by themselves.
- Bones need muscles to move them.
-There are many muscles in our body. The
muscles lie underneath our skin and cover our
skeleton.
-Muscles are also found in organs such as our
heart and gullet (also known as??)
12. Muscular System
-Muscles can become shorter, or contract.
-They can also become longer and soft. That
is their relaxed position.
-D.I.Y. : What happens when you straighten/
bend your arm?
13. Muscular System
Muscles enable our body to move
by contracting and relaxing.
Our muscles and skeleton work
together to help us move. This
proves that 2 or more systems
can work together to perform a
function.
