Circulation – pumping of blood through the entire
body by the heart.
Circulation
Coronary circulation – the
circulation of...
What is the circulatory system?


The circulatory system carries blood and dissolved
substances to and from different pla...
How does this system work?
pulmonary vein

pulmonary artery

lungs
head & arms
aorta
main vein

Right

Left
liver

digesti...
Our circulatory system is a double circulatory system.
This means it has two parts parts.
Lungs

the right side of

the le...
The Heart
This is a vein. It brings
blood from the body,
except the lungs.

These are arteries.
They carry blood
away from...
The Heart
Artery to Lungs
Vein from Head and Body

Right Atrium
valve

Right Ventricle

Artery to Head and Body
Vein from ...
How does the Heart work?
STEP ONE
blood from the
body

blood from
the lungs
The heart beat begins when the
heart muscles r...
How does the Heart work?
STEP TWO

The atria then contract and
the valves open to allow blood
into the ventricles.
How does the Heart work?
STEP THREE

The valves close to stop blood
flowing backwards.
The ventricles contract forcing
the...
blood from the heart gets around
the body through blood vessels
There are 3 types of blood vessels

a.

ARTERY

b.

VEIN

...
The ARTERY
Arteries carry blood away from the heart.

the elastic fibres allow
the artery to stretch
under pressure

thick...
The VEIN
Veins carry blood towards from the heart.
veins have valves
which act to stop the
blood from going in
the wrong d...
The CAPILLARY
Capillaries link Arteries with Veins
they exchange materials
between the blood and
other body cells.

the wa...
The CAPILLARY
A collection of capillaries is known as a capillary bed.
bed
artery

body cell

vein

capillaries
what’s in
digested food
red blood cells

white blood cells

oxygen

waste (urea)

platelets

carbon dioxide
plasma

hormon...
The Blood

red blood cell

platelets

white blood cell

plasma
Red Blood Cells
a biconcave disc that is
round and flat without a
nucleus

contain haemoglobin, a
molecule specially desig...
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.
Thi...
Plasma
It also contains useful
things like;
• carbon dioxide
A strawcoloured
liquid that
carries the
cells and the
platele...
Circulatory system (1)
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Circulatory system (1)

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Circulatory system (1)

  1. 1. Circulation – pumping of blood through the entire body by the heart. Circulation Coronary circulation – the circulation of blood within the heart. Pulmonary circulation – the flow of blood between the heart and lungs. Systemic circulation – the flow of blood between the heart and the cells of the body.
  2. 2. What is the 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. 3. How does this system work? pulmonary vein pulmonary artery lungs head & arms aorta main vein Right Left liver digestive system kidneys legs Circulatory System
  4. 4. Our circulatory system is a double circulatory system. This means it has two parts parts. Lungs the right side of the left side of the system the system deals with deals with oxygenated deoxygenated blood. blood. Body cells
  5. 5. The Heart This is a vein. It brings blood from the body, except the lungs. These are arteries. They carry blood away from the heart. 2 atria 2 ventricles Coronary arteries, the hearts own blood supply The heart has four chambers now lets look inside the heart
  6. 6. The Heart Artery to Lungs Vein from Head and Body Right Atrium valve Right Ventricle Artery to Head and Body Vein from Lungs Left Atrium valve Left Ventricle
  7. 7. How does the Heart work? STEP ONE blood from the body blood from the lungs The heart beat begins when the heart muscles relax and blood flows into the atria.
  8. 8. How does the Heart work? STEP TWO The atria then contract and the valves open to allow blood into the ventricles.
  9. 9. How does the Heart work? STEP THREE 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.
  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 Arteries carry blood away from the heart. 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.
  12. 12. The VEIN Veins carry blood towards from the heart. veins have valves which act to stop the blood from going in the wrong direction. thin muscle and elastic fibres 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 they exchange materials between the blood and other body cells. 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.
  14. 14. The CAPILLARY A collection of capillaries is known as a capillary bed. bed artery body cell vein capillaries
  15. 15. what’s in digested food red blood cells white blood cells oxygen waste (urea) platelets carbon dioxide plasma hormones
  16. 16. The Blood red blood cell platelets white blood cell plasma
  17. 17. 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.
  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. macrophages ‘eat’ and digest microorganisms . some lymphocytes fight disease by making antibodies to destroy invaders by dissolving them. other lymphocytes make antitoxins to break down poisons.
  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 It also contains useful things like; • carbon dioxide A strawcoloured liquid that carries the cells and the platelets which help blood clot. • glucose • amino acids • proteins • minerals • vitamins • hormones • waste materials like urea.

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