S. MORRIS 2006
 The circulatory system carries blood and dissolved
substances to and from different places in the body.
 The Heart has ...
lungs
head & arms
liver
digestive system
kidneys
legs
pulmonary artery
aorta
pulmonary vein
main vein
LeftRight
How does t...
Lungs
Body cells
Our circulatory system is a double circulatory system.
This means it has two parts parts.
the right side ...
The Heart
These are arteries.
They carry blood
away from the heart.
This is a vein. It brings
blood from the body,
except ...
The Heart
Left Ventricle
Left Atrium
Right Atrium
Right Ventricle
valve
Vein from Lungs
Artery to Head and BodyArtery to L...
How does the Heart work?
blood from the
body
blood from
the lungs
The heart beat begins when the
heart muscles relax and b...
The atria then contract and
the valves open to allow blood
into the ventricles.
How does the Heart work?
STEP TWO
How does the Heart work?
The valves close to stop blood
flowing backwards.
The ventricles contract forcing
the blood to le...
blood from the heart gets around
the body through blood vessels
There are 3 types of blood vessels
a. ARTERY
b. VEIN
c. CA...
The ARTERY
thick muscle and
elastic fibres
Arteries carry blood away from the heart.
the elastic fibres allow
the artery t...
The VEIN
Veins carry blood towards from the heart.
thin muscle and
elastic fibres
veins have valves
which act to stop the
...
The CAPILLARY
Capillaries link Arteries with Veins
the wall of a capillary
is only one cell thick
they exchange materials
...
artery vein
capillaries
body cell
The CAPILLARY
A collection of capillaries is known as a capillary bedcapillary bed.
what’s in
red blood cells white blood cells
platelets
plasma
carbon dioxide
digested food
waste (urea)
hormones
oxygen
The Blood
plasma
red blood cell white blood cell
platelets
Red Blood Cells
contain haemoglobin, a
molecule specially designed
to hold oxygen and carry it
to cells that need it.
can ...
White Blood Cells
there are many different types and
all contain a big nucleus.
the two main ones are the
lymphocytes and ...
Platelets
Platelets are bits of cell
broken off larger cells.
Platelets produce
tiny fibrinogen
fibres to form a net.
This...
Plasma
A straw-
coloured
liquid that
carries the
cells and the
platelets
which help
blood clot.
• carbon dioxide
• glucose...
SUMMARY
copy and complete the following;
Arteries take blood ______ from the heart. The walls of an artery
are made up of ...
This powerpoint was kindly donated to
www.worldofteaching.com
http://www.worldofteaching.com is home to over a
thousand po...
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Circulatory system

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Circulatory system

  1. 1. S. MORRIS 2006
  2. 2.  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. What is the circulatory system?
  3. 3. lungs head & arms liver digestive system kidneys legs pulmonary artery aorta pulmonary vein main vein LeftRight How does this system work? Circulatory System
  4. 4. Lungs Body cells Our circulatory system is a double circulatory system. This means it has two parts parts. the right side of the system deals with deoxygenated blood. the left side of the system deals with oxygenated blood.
  5. 5. The Heart These are arteries. They carry blood away from the heart. This is a vein. It brings blood from the body, except the lungs. Coronary arteries, the hearts own blood supply The heart has four chambers 2 atria 2 ventricles now lets look inside the heart
  6. 6. The Heart Left Ventricle Left Atrium Right Atrium Right Ventricle valve Vein from Lungs Artery to Head and BodyArtery to Lungs Vein from Head and Body valve
  7. 7. How does the Heart work? blood from the body blood from the lungs The heart beat begins when the heart muscles relax and blood flows into the atria. STEP ONE
  8. 8. The atria then contract and the valves open to allow blood into the ventricles. How does the Heart work? STEP TWO
  9. 9. How does the Heart work? The valves close to stop blood flowing backwards. The ventricles contract forcing the blood to leave the heart. At the same time, the atria are relaxing and once again filling with blood. The cycle then repeats itself. STEP THREE
  10. 10. blood from the heart gets around the body through blood vessels There are 3 types of blood vessels a. ARTERY b. VEIN c. CAPILLARY
  11. 11. The ARTERY thick muscle and elastic fibres Arteries carry blood away from the heart. the elastic fibres allow the artery to stretch under pressure the thick muscle can contract to push the blood along.
  12. 12. The VEIN Veins carry blood towards from the heart. 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.
  13. 13. The CAPILLARY Capillaries link Arteries with Veins the wall of a capillary is only one cell thick they exchange materials between the blood and other body cells. The exchange of materials between the blood and the body can only occur through capillaries.
  14. 14. artery vein capillaries body cell The CAPILLARY A collection of capillaries is known as a capillary bedcapillary bed.
  15. 15. what’s in red blood cells white blood cells platelets plasma carbon dioxide digested food waste (urea) hormones oxygen
  16. 16. The Blood plasma red blood cell white blood cell platelets
  17. 17. Red Blood Cells 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. a biconcave disc that is round and flat without a nucleus
  18. 18. White Blood Cells there are many different types and all contain a big nucleus. the two main ones are the lymphocytes and the macrophages. some lymphocytes fight disease by making antibodies to destroy invaders by dissolving them. other lymphocytes make antitoxins to break down poisons. macrophages ‘eat’ and digest micro- organisms .
  19. 19. Platelets Platelets are bits of cell broken off larger cells. Platelets produce tiny fibrinogen fibres to form a net. This net traps other blood cells to form a blood clot.
  20. 20. Plasma A straw- coloured liquid that carries the cells and the platelets which help blood clot. • carbon dioxide • glucose • amino acids • proteins • minerals • vitamins • hormones • waste materials like urea. It also contains useful things like;
  21. 21. SUMMARY copy and complete the following; Arteries take blood ______ from the heart. The walls of an artery are made up of thick _________ walls and elastic fibres. Veins carry blood ________ the heart and also have valves. The _________ link arteries and veins, and have a one cell thick wall. Blood is made up of four main things ______, the liquid part of the blood; Red Blood Cells to carry ______; White Blood cells to protect the body from disease and _________ to help blood clot. away platelets towards capillaries plasma oxygen muscular
  22. 22. This powerpoint was kindly donated to www.worldofteaching.com http://www.worldofteaching.com is home to over a thousand powerpoints submitted by teachers. This is a completely free site and requires no registration. Please visit and I hope it will help in your teaching.

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