Heart and circulation

1. Heart and Circulation

2. • That blood transports substances to and
from the cells of the body
• The heart pumps the blood around the lungs
and body
• How the heart works and why the heart
needs to work efficiently

3. Let’s throw up all that we
know about the heart and
circulation already!

4. We distinguish between:
Arteries in which blood flows
away from the heart;
Veins in which blood flows back
to the heart.
The human circulatory system consists of
the heart which acts as a pump, and the
blood vessels in which the blood flows.

5. The dissolved food and
oxygen needed for
respiration are carried
around the body by the
circulatory system.

6. There are four
chambers in the heart.
There are two
chambers on each side.
One chamber is on the
top and one chamber is
on the bottom.
Why are there two
seperate sides?

7. Your heart is a double pump:
The Right side of your heart
receives blood from the body
and pumps it to the lungs.
The Left side of the heart does
the exact opposite: It receives blood
From the lungs and pumps
it out to the body.
Oxygenated blood -
“Oxygen- rich”
Mainly found in
arteries
Deoxygenated blood
-
“Oxygen-poor”
Mainly found in veins
http://www.bbc.co.uk/schools/gcsebitesize/science/triple_aqa/transport_systems/bl
ood_system/revision/2/

8. Blood travels
from the heart to
the lungs
Blood picks up
oxygen from the
lungs and gives
out carbon
dioxide
Oxygenated
blood travels
back to the
heart
Oxygenated
blood travels
from the heart to
the body
Body cells use
oxygen and give
blood carbon
dioxide.
Deoxygenated
blood travels from
the body to the
heart
body
cells
lungs
lungs

9. Blood travels
from the heart to
the lungs
Blood picks up oxygen
from the lungs and gives
out carbon dioxide
Oxygenated
blood travels
back to the
heart
Oxygenated
blood travels
from the heart to
the body
Body cells use oxygen and
give blood carbon dioxide.
Deoxygenated
blood travels from
the body to the
heart
body
cells
lungs
lungs

10. What do you notice?

11. Arteries
•Have thick walls
•Carry oxygenated (red)
blood away from the heart
to the body (apart from
Pulmonary artery)
•Blood moves at high
pressure
Veins
•Have thin walls
•Carry deoxygenated (blue)
blood to the heart from the
body
•Have valves to keep blood
flowing in the right direction.

12. Capillaries
•Have thin walls, only one
cell thick
•Substances are able to
pass in and out of the
blood
•Delivers oxygen and
glucose, removes waste
RED BLOOD CELLS
THIN CELL WALL
BODY CELLS

13. Gap Fill
Arteries, veins,
capillaries

14. • Heart Worksheet
• Notes on the 4 main components of blood

15. Loop game