Level 1 BTEC sport

1. Cardiovascular System

2. Heart
 Pump blood around the body
 The heart is a hollow, muscular organ divided by a
vertical wall called the septum
 Two chambers are further divided into the thin walled
atrium above, and a thick walled ventricle below, making
four chambers
 Each pair of chambers are valves preventing any back
flow of blood

3. Blood vessels
 Blood vessels leaving the heart generally carry
oxygenated blood through vessels known as arteries
 Blood vessels that return blood to the heart are
known as veins which generally carry de-oxygenated
blood to the heart
 Can you think of any other blood vessels?

4. Blood
 Carries oxygen around the body to living cells
 Carries carbon dioxide to the lungs
 Fights infection
 What types of blood cells fight infection?
 Platelets-clot the blood

5. 3 Main Functions
 Transport
 Regulate
 Protect

6. Transport
 Oxygen from the lungs to the cells
 Carbon dioxide from the cells to the lungs
 Nutrients to the cells
 Waste material from the cells
 Heat from various cells

7. Regulates
 Body temperature
 Salts
 Water content in the cells

8. Protect
 Blood prevents loss by clotting and combats toxins

9. Back to the Heart
 The heart is a DOUBLE PUMP:
 1st - blood is pumped to the lungs & returns to the
heart,
 2nd - blood is pumped to respiring muscles & back to
the heart again.

10. .
1. Deoxygenated 2. The blood
blood is pumped receives oxygen and
from the heart to the is pumped back to
lungs the heart
4. The oxygen
leaves the blood to
be used for
3. The oxygenated
respiration in the
blood is then
body and the blood
pumped to the rest
goes back to the
of the body
heart

11. Circulatory system
 http://www.youtube.com/watch?v=D3ZDJgFDdk0

12. The Heart

13. Right Atrium
 The right atrium is one of four chambers (two atria
and two ventricles).
 It receives deoxygenated blood from the vena cava,
and pumps it into the right ventricle through the
tricuspid valve

14. Right Ventricle
 It receives deoxygenated blood from the right atrium
via the tricuspid valve, and pumps it into the
pulmonary artery

15. Pulmonary Artery
 The pulmonary arteries carry deoxygenated
blood from the heart to the lungs.
 It then branches into two pulmonary arteries (left
and right), which deliver de-oxygenated blood to the
corresponding lung
 Here the blood gives up carbon dioxide and takes on
a fresh supply of oxygen

16. Pulmonary Vein
 The pulmonary vein is a large blood vessel that
carries blood from the lungs to the left atrium of the
heart. In humans there are four pulmonary veins,
two from each lung.

17. Left Atrium
 The left atrium is one of the four chambers in the
human heart. It receives oxygenated blood from the
pulmonary veins, and pumps it into the left ventricle.

18. Left Ventricle
 The left ventricle is one of four chambers (two
atria and two ventricles) in the human heart. It
receives oxygenated blood from the left atrium, and
pumps it into the aorta

19. Aorta
 is the largest artery in the body, originating from the
left ventricle of the heart.
 It branches off into two smaller. The aorta
distributes oxygenated blood to all parts of the body.

20. Vena Cava
 The Vena Cava are the veins that return
deoxygenated blood from the body into the heart.
They both empty into the right atrium.
 And so on and so on...........