2. NUTRITION
Nutrients give our cells all the energy
they need.
The digestive system,the respiratory
system,the circulatory system and the
excretory system carry out the
function of nutrition.
4. THE RESPIRATORY SYSTEM
The respiratory system is in charge of
breathing.
Breathing makes two movements:
- First we inhale air and it goes into
the lungs.
- Then we exhale air sending it out of
the lungs
5.
6. THE EXCRETORY SYSTEM
The excretory system filters waste
substances from the blood. It
removes them from the body through
excretion.
The excretory system is made up of
sweat glands and the urinary system.
8. THE CIRCULATORY SYSTEM
Transports nutrients and oxygen to
our cells. It is made up of the heart,
blood and blood vessels.
The heart is a muscular organ that
pumps blood around the body.
The blood collets oxygen and
nutrients and transport
Blood vessels are three types;arteries
veins and capillaries
9. The arteries:carry blood from the heart to
the rest of the body.
The capillaries are very thin vessels that
reach cells of the body.
The veins carry blood from all over the
body back to the heart.
10. THE BLOOD
Blood is a red liquid tissue made up
of cells that float in a liquid called
plasma.
There are three types of blood cells,
red blood cells white blood cells and
platelets.
11. THE HEART
The heart uses rhythmic systole and
diastole movements to pump the
blood around the body.
1.Blood enters the atria through the
veins.
2.Then passes to the ventricles.
3.Blood comes out of the ventricles
through the arteries.
4.Finally travels all over the body.
