Final answer:
Vibrations in heart tissues created by changes in blood flow is true.
Step-by-step explanation:
The statement 'Vibrations in heart tissues created by changes in blood flow' is True.
When blood flows through the heart, it creates vibrations in the heart tissues. These vibrations are caused by the changes in blood flow as the heart contracts and relaxes. These vibrations can be detected as a heartbeat and are essential for the proper functioning of the circulatory system.