★ Respiratory System Quiz
The nostrils, larynx, and trachea are all made primarily of:
A. Cartilage
B. Bone
C. Muscle
D. Tendons
Select your answer:
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Immunisation › ViewWhy might you become ill after visiting a friend who is sick with the flu?
A. The room your friend was in was too warm.
B. You ate the same kind of food your friend ate.
C. You did not dress properly.
D. The virus that causes the flu entered your body.
Heart › View
The difference between the maximum and resting cardiac output is called __________.
A. preload
B. stroke volume
C. contractility
D. afterload
E. cardiac reserve