PPT: The Circulatory System | Science Class 7 PDF Download

 Page 1


T H E
C I R C U L A T O R Y
S Y S T E M
The role of the heart, blood
and blood vessels
Page 2


T H E
C I R C U L A T O R Y
S Y S T E M
The role of the heart, blood
and blood vessels
Name and describe the
main parts of the human
circulatory system.
Describe the role of the
heart, blood and blood
vessels.
TODAY, YOU WILL...
Page 3


T H E
C I R C U L A T O R Y
S Y S T E M
The role of the heart, blood
and blood vessels
Name and describe the
main parts of the human
circulatory system.
Describe the role of the
heart, blood and blood
vessels.
TODAY, YOU WILL...
Function
To transport blood,
oxygen and nutrients to
the body
Main Parts
Has three main parts: the
heart, blood vessels and
blood
THE HUMAN
CIRCULATORY SYSTEM
Page 4


T H E
C I R C U L A T O R Y
S Y S T E M
The role of the heart, blood
and blood vessels
Name and describe the
main parts of the human
circulatory system.
Describe the role of the
heart, blood and blood
vessels.
TODAY, YOU WILL...
Function
To transport blood,
oxygen and nutrients to
the body
Main Parts
Has three main parts: the
heart, blood vessels and
blood
THE HUMAN
CIRCULATORY SYSTEM
It works as a pump to move the
blood around the body. 
It has four chambers—two atria
(upper chambers) and two
ventricles (lower chambers).
THE HEART
right atrium
left atrium
right ventricle
left ventricle
Page 5


T H E
C I R C U L A T O R Y
S Y S T E M
The role of the heart, blood
and blood vessels
Name and describe the
main parts of the human
circulatory system.
Describe the role of the
heart, blood and blood
vessels.
TODAY, YOU WILL...
Function
To transport blood,
oxygen and nutrients to
the body
Main Parts
Has three main parts: the
heart, blood vessels and
blood
THE HUMAN
CIRCULATORY SYSTEM
It works as a pump to move the
blood around the body. 
It has four chambers—two atria
(upper chambers) and two
ventricles (lower chambers).
THE HEART
right atrium
left atrium
right ventricle
left ventricle
Let’s examine how blood flows through the heart.
THE HEART
The right atrium takes in blood
carrying carbon dioxide.
Blood is squeezed down into the
right ventricle and taken to the
lungs, where oxygen replaces
carbon dioxide.
1
2
from upper
body
to left
lung
1
2