2. Circulatory system
• The circulatory system is
made up of your heart
and blood vessels.
• The heart pumps blood to
all areas of your body.
• The blood carries oxygen
and nutrients to your
body
3. The heart
• The heart is a
muscular organ inside
the rib cage, between
the lungs.
• It’s about the size of
your fist (closed hand)
4. But the heart muscle is special
because of what it does.
• The heart sends blood
around your body.
• The blood provides your
body with the oxygen and
nutrients it needs.
• It also carries away
waste.
5. Heart Parts
• The heart is made up of
four different areas, and
each of these areas is
called a chamber.
• There are two chambers
on each side of the heart.
One chamber is on the
top and one chamber is
on the bottom.
Chambers
6. Chambers
• The two chambers on top
are called the atrium .
• The heart has a left
atrium and a right atrium.
• The two chambers on the
bottom are called the
ventricles.
• The heart has a left
ventricle and a right
ventricle.
Right
Atrium
Right
ventricle
Left
Atrium
Left
ventricle
7. Septum
• Running down the middle
of the heart is a thick wall
of muscle called the
septum.
• The septum's job is to
separate the left side and
the right side of the heart.
Septum
8. Blood
• The blood moves
through many tubes
called arteries, veins
and capillaries.
• Which together are
called blood vessels.
9. Blood vessels
•
These blood vessels are
attached to the heart.
Blood vessels types
•
The blood vessels that carry
blood away from the heart are
called arteries.
•
The ones that carry blood back
to the heart are called veins.
•
The tiny blood vessels that
connect the smallest arteries
to the smallest veins are called
capillaries.
Arteries
Veins
Capillaries
10. Blood
• Blood is a red liquid that
flows through blood
vessels.
• Blood contains liquid
plasma and solid blood
cells.
• There are three types of
blood cells:
• Red blood cells
• White blood cells and
• Platelest.
11. Blood composition
• Platelets help to form a
solid clot when there is a
cut in a blood vessel.
• Red blood cells carry
oxygen. They can also
carry some carbon
dioxide.
• White blood cells fight
infections in the body.
