Answer:

heartbeat

Answer	Crossword Clue
HEARTBEAT	Chest pulsation
HEARTBEAT	Pulse sound
HEARTBEAT	Vital throb.

HEARTBEAT	Vital center
HEARTBEAT	Pulsation
HEARTBEAT	Pump thump
HEARTBEAT	Physical sound?
HEARTBEAT	Exam measurement unit
HEARTBEAT	Symbol of life
HEARTBEAT	"... in a ..": cardiologist

Crossword

a puzzle consisting of a grid of squares and blanks into which words crossing vertically and horizontally are written according to clues.