The __________ Circuit Sends Oxygen-Rich Blood from the Heart to All

Q47: The top of the heart is called

Q48: What effect does an excess of potassium

Q49: How does heart rate affect blood pressure?<br>A)

Q50: The cardiac conduction system is composed of

Q51: Normal heart rate is closest to which

Q53: The aorta is part ofthe _ circuit.

Q54: There is/are _ brachiocephalic trunk(s) and _

Q55: Blood is supplied to the myocardium by

Q56: The painful condition known as angina pectoris

Q57: When the left ventricle contracts, blood passes