Worksheet
Name:
Date:
Class:
Heart Beat
In each of the pairs of statements below, one statement is right and one is wrong.
Tick the correct one, and then explain what is wrong with the other one.
1
a
The left side of the heart contracts before the right side of the heart.
b
Both sides of the heart contract simultaneously.
_______________________________________________________________________
_______________________________________________________________________
_______________________________________________________________________
_______________________________________________________________________
_______________________________________________________________________
2
a
When the left ventricle contracts, the bicuspid valve is forced closed by the pressure
of the blood.
b
When the left ventricle contracts, the bicuspid valve closes itself to stop blood
flowing the wrong way.
_______________________________________________________________________
_______________________________________________________________________
_______________________________________________________________________
_______________________________________________________________________
_______________________________________________________________________