SuperStar9 -- What happens when you crack your joints? (A)

Article posted January 29, 2009 at 06:55 PM GMT0 • comment (3) • Reads 6879

CheerGirl98 -- How many times does your heart beat a day? (A)

Article posted January 12, 2009 at 03:28 PM GMT0 • comment (1) • Reads 1130

TapGirl -- What is your brain made out of? (A)

Article posted January 12, 2009 at 03:09 PM GMT0 • comment (2) • Reads 1268

Halo3Power -- How does our body fight disease? (A, Audio)

Article posted January 22, 2009 at 07:06 PM GMT0 • comment (1) • Reads 1263

Rocker87 -- How do all muscles work at a time? (A)

Article posted January 21, 2009 at 07:50 PM GMT0 • comment (1) • Reads 1253

Luigi2Power -- Why does my foot fall asleep? (A)

Article posted January 12, 2009 at 03:37 PM GMT0 • comment (2) • Reads 1464

Locust117 -- How should you exercise correctly? (A)

Article posted January 13, 2009 at 02:56 PM GMT0 • comment (1) • Reads 1298

MusicGirl -- How Does A Lung Collapse? (A)

Article posted January 21, 2009 at 03:35 PM GMT0 • comment (2) • Reads 1202

Shorty11 -- How much blood does your heart pump per minute? (A)

Article posted January 21, 2009 at 07:42 PM GMT0 • comment (1) • Reads 1256

Mets1 -- What happens to your food when you throw up? (A)

Article posted January 23, 2009 at 03:11 PM GMT0 • comment (4) • Reads 1471

RedSoxHater#1 -- How stress affects the human body (A)

Article posted January 22, 2009 at 03:38 PM GMT0 • comment (3) • Reads 1127

FlowerGirl -- Are There Layers of Skin? (A)

Article posted January 13, 2009 at 03:12 PM GMT0 • comment (2) • Reads 1300

HollibackGurl42 -- If you cut yourself very badly would you need stitches? (A)

Article posted January 21, 2009 at 03:32 PM GMT0 • comment (2) • Reads 1293

NickJonasLuver16 -- Is your blood really blue inside of your body? (A)

Article posted January 21, 2009 at 02:26 PM GMT0 • comment (2) • Reads 1214

MoneyInTheBank -- How many times does your heart beat per day? (A)

Article posted January 27, 2009 at 03:17 PM GMT0 • comment (2) • Reads 1238

BlackPanther800 -- Why can't you move involuntary muscles? (A)

Article posted February 6, 2009 at 03:30 PM GMT0 • comment (1) • Reads 1330