-In the diagram, box A points to what?
Definitions:
Blood Flow Velocity
The speed at which blood moves through the vessels, which can vary depending on vessel size, blood viscosity, and cardiac output.
Cardiac
Relating to the heart and its functions or diseases.
Oscilloscope
An electronic instrument used to observe and measure varying electrical voltages in the form of a two-dimensional graph.
Electrical Wave
A form of energy wave characterized by the movement of electric charges, which can be used in various technological and medical applications.
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