What are the three main components of the circulatory system?
a. heart, arteries, and veins
b. heart, blood, and lymph
c. heart, blood vessels, and blood
d. heart, blood vessels, and lungs
e. smooth muscle, blood, and blood vessels
c
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The ________ is the maximum volume of air that can be forcefully exhaled after a maximum forceful inspiration.
A. expiratory reserve volume B. vital capacity C. total lung capacity D. residual volume
The vertebral column is part of the ________ skeleton.
A. axial B. appendicular
A person who has full-blown AIDS often dies as a result of ________
A) Organ failure and subsequent transplant B) Infectious diseases C) Over-proliferation of T-cells D) The HIV virus
Platelets are
A) red blood cells that lack a nucleus. B) red blood cells that have a nucleus. C) large cells with a prominent, concave nucleus. D) tiny cells with a polynucleus. E) cytoplasmic fragments of large cells.