4 Flashcards
1
Q
What is the heart?
A
a hollow, muscular, fourchambered organ that
pumps blood to two separate circulatory loops.
2
Q
How is the heart regulated in its pumping rate and strength?
A
The heart is regulated by the autonomic nervous system which controls a pacemaker (sinoatrial node.)
3
Q
What are the two separate circulatory loops that the heart pumps to?
A
the pulmonary circulation, and the systemic circulation.
