Asked by Amanda
Blood pressure is a measure of
A. oxygen levels in the blood.
B. the ratio of red blood cells to white blood cells.
C. how hard the heart is working.
D. the pressure exerted by hemoglobin against the vascular walls.
D.
A. oxygen levels in the blood.
B. the ratio of red blood cells to white blood cells.
C. how hard the heart is working.
D. the pressure exerted by hemoglobin against the vascular walls.
D.
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