★ Circulatory and Lymphatic System Quiz
What part of the body decreases the activity of the SA and AV nodes?
A. excretory system
B. respiratory system
C. sympathetic nervous system
D. parasympathetic nervous system
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The superior vena cava:
A. carries blood from the heart
B. delivers blood to the cardiac muscles
C. receives blood from the upper extremities and head
D. delivers blood from the aorta to the right subclavian artery
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