Science Buddies: "Ask an Expert"

I thank anybody that answers these questions!

-->What is the purpose of a heart?

-->Does playing different sports affect your heart rate?

-->What is a "Heart Rate" ?

-->Does stretching/warming up affect your final heart rate?

If you can answer these soon i will be as happy as this guy






Thank you for your time

gman62191,

The purpose of the heart is to circulate blood throughout the body, allowing the tissues to recieve fresh, oxygenated blood, and providing a way for oxygen-depleted blood to resotre is oxygen levels.

Playing sports affects your heart rate, speeding it up. The more movement and stress involved in a given sport, the more it will affect your heart rate.

Heart rate is often expressed in beats per minute. In other words, how many times does your heart pump each miniute.