heart beats

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More Facts About the Human Body

Alice Henry @IreneVincent (15960) • United States 5 Jan 17

The human body is an amazing mechanism, beginning with a single cell, which when fertilized grows into a human baby and continues to grow into an adult after being born. All systems develop: skeletal, circulatory, glandular,...

4 responses •

5 people

Did you know......

celticeagle @celticeagle (189915) • Boise, Idaho 15 Sep 15

this about hummingbirds? They can fly both backwards and upside down. All their eating and flying costs them a lot of energy. Wings flap as many times as 80 times a second. Heart beats 400x a minute when not flying and when in...

6 responses •

5 people

My Theory on Life... What do you think?

iAlicia @iAlicia (758) • United States 13 Dec 06

My Theory on Life This is just something I thought of, it's not a fact. I think humans were all born with the same given number of heart beats, right? So... each person starts with the same number of heart beats in their...

49 responses •

7 people