How did your stethoscope work?  Can you tell how many times your heart beats in a minute?  My heart beats about 70 times per minute.  Did you know that when you exercise a lot your heart gets very strong.  That is because your heart is one big muscle and with exercise muscles become bigger and stronger.  To learn more about the heart and lungs you can go visit some of the fun sites I found for you.  My favorite sites are the ones that show movies about the heart, lungs, and blood.  Check them out! Click on me to go back inside the clubhouse.

http://www.brainpop.com/health/circulatory/blood/index.weml (movie on blood)

http://www.brainpop.com/health/circulatory/circulatorysystem/index.weml (movie on circulatory system)

http://sln.fi.edu/biosci/blood/blood.html (a tour of the heart)

http://kidshealth.org/kid/body/heart_SW.html (all about the heart)

http://www.sk.lung.ca/content.cfm/kbreathe (breathing)

http://sln2.fi.edu/biosci/preview/heartpreview.html (Franklin Institute)

http://kidshealth.org/kid/body/lungs_noSW.html (looking at lungs)

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