★ Heart Structure and Double Circulation Quiz
The most muscular chamber of the heart is the
A. left ventricle
B. left atrium
C. right atrium
D. right ventricle
Select your answer:

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Uses of Radioactive Radiation › ViewName the instrument used to detect radioactivity.
A. voltmeter
B. ohmeter
C. seismograph
D. geiger counter
Circulatory System - Pathway of Blood › View
What type of blood does the right ventricle carry?
A. low in oxygen
B. high in oxygen