6. Which of the following describes the correct
passage of blood originating from the left leg?
a. Vena cava left atrium-right atrium
lungs left ventricle right ventricle
aorta
b. Vena cava right atrium
left atrium-
lungs right ventricle left ventricle - aorta
c. Vena cava left atrium left ventricle
lungs right atrium-right ventricle - aorta
d. Vena cava right atrium right ventricle -
lungs left atrium left ventricle aorta
7. What is the functional unit of the nervous
system?
a brain b. neurons c. muscles d. bones
8. What controls and coordinates the activities of
the whole nervous system?
a, central nervous system
b. sympathetic nervous system
c. nervous system
d. brain