MYOCARDIUM:
• Middle, thickest layer
of the heart
• Contains the muscle fibres
which are responsible for
pumping
• Contraction of this layer
allows blood to be pumped
through to the blood vessels
HEART IS DIVIDED INTO FOUR CHAMBERS:
A: Right Atrium
V: Right Ventricle
A: Left Atrium
V: Left Ventricle
The upper chambers are: The lower chambers are:
• The atria • The ventricles
- Right - Right
- Left - Left
, THE RIGHT ATRIUM: LOWER CHAMBERS
Receives deoxygenated blood from The right ventricle:
the body through the: Receives de-oxygenated blood
• superior vena cava (head and as the right atrium contracts
The left ventricle:
upper body)
Receives oxygenated blood
• inferior vena cava (legs and lower as the left atrium
torso) contracts
THE CARDIOVASCULAR SYSTEM
• Middle, thickest layer
of the heart
• Contains the muscle fibres
which are responsible for
pumping
• Contraction of this layer
allows blood to be pumped
through to the blood vessels
HEART IS DIVIDED INTO FOUR CHAMBERS:
A: Right Atrium
V: Right Ventricle
A: Left Atrium
V: Left Ventricle
The upper chambers are: The lower chambers are:
• The atria • The ventricles
- Right - Right
- Left - Left
, THE RIGHT ATRIUM: LOWER CHAMBERS
Receives deoxygenated blood from The right ventricle:
the body through the: Receives de-oxygenated blood
• superior vena cava (head and as the right atrium contracts
The left ventricle:
upper body)
Receives oxygenated blood
• inferior vena cava (legs and lower as the left atrium
torso) contracts
THE CARDIOVASCULAR SYSTEM
