2. 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
fuction of nutrition
3. The digestive
sysytem it has two
parts:the digestive
tract and the
digestive glands.
4. The respiratory
system is in charge
of breathing.
Breathing makes
two movements:
Firts,we inhale.
Then,we exhale.
5. The excretory
system filters the
waste subtances
from the blood.It
removes them from
the body through
excretion.
The excretory
system is made up
of:sweat glands and
the urinary system.
6.
7. 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 collects oxygen and nutrients and
transports them to all the cells.
The blood vessels there are three
types:arteries,veins and capillaries.
8. 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.
9. The heart uses
rythmic systole and
diastole movements
to pump the blood
around the body.
Blood enters the atria
through the veins
and passes to the
ventricles.Bloood
comes out of the
ventricles,through
the arteries and
travels all over the
body.
10. Human circulation
is closed.In
mamals,the heart
septum separates
the two halves of
the heart.
Pulmonary
circulation.
Systemic
circulation.
