Heart Flashcards
1
Q
What is the double circulatory system?
A
two circuits joined together; the right side pumps deoxygenated blood to the lungs, left side pumps oxygenated blood to the body.
2
Q
How many chambers does the heart have?
A
4
3
Q
What vein does the deoxygenated blood enter the heart from?
A
vena cava
4
Q
What artery does oxygenated blood leave the heart from?
A
aorta
5
Q
How is the resting heart rate controlled?
A
by a group of cells in the right atrium wall that act as a pacemaker and produce electric impulses which spread to surrounding muscle cells, causing them to contract.
6
Q
What is an artificial pacemaker?
A
a device that’s implanted under the skin and has a wire connected to the heart which produces an electric current to keep the heart beating regularly.
