The heart Flashcards
1
Q
What is the double circulatory system?
A
blood enters the heart twice every time it is pumped around the body
2
Q
why is the left wall of the heart thicker?
A
due to the pressure needed to pump blood around the body
3
Q
what does the group of cells by the right atrium do?
A
create an electrical pulse that causes the heart to contract
(can use a pacemaker if not working)
