A Moment of Science

Posts tagged cardiac

April 9, 2009

 

People running in marathon

Why Doesn’t Your Heart Get Tired?

Skeletal muscles are attached to bone structures and cannot stay long in a flexed position without depleting their energy reserves.

Stay Connected

What is RSS? RSS makes it possible to subscribe to a website's updates instead of visiting it by delivering new posts to your RSS reader automatically. Choose to receive some or all of the updates from A Moment of Science:

Support for Indiana Public Media Comes From

About A Moment of Science

Search A Moment of Science