Download Cardiovascular System - Pupils Copy

THE CARDIOVASCULAR SYSTEM
What does Oxygenated and
Deoxygenated mean?
• Oxygenated blood:
• Deoxygenated blood:
The heart as a double pump
RIGHT
The right side of
the heart
transports deoxygenated blood
to the
……………..
and deals with
blood returning
from the
……………..
LEFT
The left side of the
heart transports
oxygenated blood
to the
……………..
and deals with the
blood returning
from the
……………..
How it Works
LUNGS
HEART
BODY
Oxygenated and Deoxygenated blood
• When the blood leaves the lungs it is
………………….
• The blood then visits the muscles in the
body and gives the oxygen to them so
they can work.
• The blood is now ………………….
• The …………………. blood then visits the
lungs when it picks up oxygen and
becomes ………………….
The structure of the heart
Structure of the heart
CHAMBERS
1
Right
Atrium
2
Right
Ventricle
4
Left
Atrium
3
Left Ventricle
Structure of the heart
VALVES
Semi-Lunar
Valve
Semi-Lunar
Valve
4
1
2
Tricuspid
Valve
3
Bisucpid
Valve
Structure of the heart
BLOOD VESSELS
Pulmonary
Artery
Aorta
4
1
2
Vena Cava
3
Pulmonary
vein
Structure of the heart
BLOOD VESSELS
Septum
Functions of the chambers
• The right atrium takes deoxygenated blood
from the vena cava and stores it before
sending it through the tricuspid valve.
• The right ventricle receives de-oxygenated
blood through the tricuspid valve before
pumping it up the pulmonary artery to the
lungs.
Functions of the chambers
• The left atrium
• The left ventricle
Functions of the valves
• The tricuspid valve stops blood flowing
back into the right atrium.
• The bicuspid valve
• The semi lunar valves stop blood flowing
back into the left and right ………………
Functions of the blood vessels
• The vena cava transports de-oxygenated
blood from the body to the heart. Here is
gives the oxygen to the working muscles.
• The pulmonary artery
Functions of the blood vessels
• The pulmonary vein transports oxygenated
blood from the lungs to the heart.
• The aorta
Blood Vessels
• Arteries
• Veins
• Capillaries
Thermoregulation:
Vasodilation of vessels
• This is when you body temperature rises.
• It is when the blood vessels expand,
meaning the blood flows nearer to the
surface of the skin.
• It is a way of cooling you down.
• It makes your skin become red after a
heart raising activity.
Thermoregulation:
Vasoconstriction of vessels
• This is when your body temperature
decreases, which makes your blood
vessels constrict.
• This means less blood flows near the
surface of your skin so less heat is lost.
• It happens when you are
• It happens when you are cold.