Help make Alexa smarter on Alexa Answers. Sign in with Amazon

Science

What makes the heart pump?


A heart pumps blood because electrical signals travel across the heart causing the muscles of the heart to alternately contract and relax. The signals are controlled by a node that sit atop of the heart between the two upper chambers. Improper signals or absence of signals causes a heart attack.

{{ relativeTimeResolver(1620845623247) }}

LIVE
Points points 38
Rating

Similar Questions
Sign in to view all similar questions

Join Alexa Answers

Help make Alexa smarter and share your knowledge with the world

LEARN MORE