TRANSFER OF BLOOD THROUGH THE CIRCULATORY SYSTEM THAT IS DOUBLE CIRCULATION OF BLOOD IN OUR HEART. HEART HAS THE JOB OF PUMPINGTHESE THINGS AROUND THE BODY. THE HEART AND BLOOD VESSELS MAKES UP THE CIRCULATORY SYSTEM. THE PPT INCLUDES THE FUNCTION OF VEIN CAPILLARIES AND ARTERY

2. CIRCULATORY SYSTEM
The circulatory system carries blood and
dissolved substances to and from different places
in the body.
The Heart has the job of pumping these things
around the body.
The Heart pumps blood and substances around
the body in tubes called blood vessels.
The Heart and blood vessels together make up the
Circulatory System.

3. Our circulatory system is a double
circulatory system.
This means it has two parts parts.
Lungs
Body cells
The left side of
the system
Deals with
oxygenated
blood.
The right side of
the system
Deals with
deoxygenated
blood.

4. THE HEART
Artery to Head and Body
Vein from Lungs
Vein from Head and Body
Artery to Lungs
Left Atrium
valve
Left VentricleRight Ventricle
valve
Right
Atrium

5. BLOOD VESSELS
THERE ARE 3 TYPES OF BLOOD VESSELS
ARTERIES
VEINS
CAPILLARIES

6. THE ARTERY
The elastic fibres
allow the artery to
stretch under
pressure
Thick muscle and elastic fibres
The thick muscle
can contract to
push the blood
along.

7. THE VEIN
Thin muscle and elastic fibres
Veins have valves
which act to stop the
blood from going in
the wrong direction.
Body muscles surround the veins
so that when they contract to
move the body, they also squeeze
the veins and push the blood along
the vessel.

8. THE CAPILLARIES
The wall of a capillary
is only one cell thick
The exchange of materials
between the blood and the
body can only occur through
capillaries.
They exchange materials
between the blood and
other body cells.

9. A collection of capillaries is known as a capillary bedcapillary bed.
veinartery
capillaries
body cell

10. WHAT IS IN BLOOD ??
RED BLOOD CELLS
WHITE BLOOD
CELLS
PLATELETS
PLASMA

11. THE BLOOD
white blood cellred blood cell
platelets plasma

12. Red Blood Cells
A biconcave disc that is
round and flat without a
nucleus
Contain haemoglobin, a
molecule specially designed
to hold oxygen and carry it
to cells that need it.
Can change shape to an amazing
extent, without breaking, as it
squeezes single file through the
capillaries.

13. There are many different types
and all contain a big nucleus.
The two main ones are the
lymphocytes and the macrophages.
Macrophages ‘eat’ and digest
micro-organisms .
Some lymphocytes fight disease by making antibodies to
destroy invaders by dissolving them.
Other lymphocytes make antitoxins to break down poisons.

14. Platelets are bits of cell
broken off larger cells.
Platelets produce
tiny fibres to form
a net. This net
traps other blood
cells to form a
blood clot.

15. A straw-coloured
liquid that
carries the cells
and the platelets
which help blood
clot.
It also contains useful
things like;
carbon dioxide
glucose
amino acids
proteins
minerals
vitamins
hormones
waste materials
like urea.

16. MOVING OXYGEN TO CELLS
1. Once oxygen has entered the red blood cells it
begins its journey inside the body
2. It starts by moving through the capillaries
they make a network of fine tubes in organd which
provide a very large surface area between the
blood and the tissues in the organ
1. This surface area allows large amounts of
substances, such as oxygen, glucose to pass
between the blood and the tissues in a short
amount of time
2. The oxygenated blood is transported to heart by
pulmonary vein and circulated around the body

18. MOVING CARBON DIOXIDE TO
THE LUNGS
1. Carbon dioxide is a product of aerobis
respiration
2. It leaves cells where it is produced and
passes through the walls of capillaries
carbon dioxide does not enter red blood cells
but stays in plasma
1. It travels along veins which take it back to
right side of the heart
2. From here carbon dioxide enter pulmonary
artery and travels to lungs and escape
through capillaries

19. MOVING GLUCOSE TO CELLS
1. Glucose contains the store of energy that
is relased during respiration
2. It reaches the cells in the following way
3. Glucose passes through the wall of small
intestine and into capillaries
4. It does not enter red blood cells but stays
in plasma
5. The glucose travels in the plasma among
veins which bring the blood to the heart
the blood enters right side of the heart, then
passes to lungs where it picks up oxygen

20. MOVING GLUCOSE TO CELLS
1. The blood then passes to left side of the
heart and into the aorta
2. From here the blood travels along arteries
and take glucose to the body organ

21. A HEALTHY HEART
The heart may beat upto 2500 million times
During a person's life
Its function is to push bloods round the 100 000
Km blood vessls in the body
This push creates a blood pressure that drives
The blood through the blood vessels
As the ventricles in the heart fill with blood
The pressure in the blood vessels in reduced