how many bones are there in the human body?
our body has over 200 bones and joints ,which enable us to move
why do we have blood?
we need blood to carry food ,oxygen, and other necessary materials to the various parts of the body
why is there red blood and dark blood?
red blood cells contain hemoglobin, which gives them a dark red color . this changes to bright red when it is combined with oxygen .bright red blood contain oxygen nd dark blood does not
what is the difference between red cells and white cells?
red cells contain hemoglobin ,which give the ld its color and carry oxygen . ite blood cells have a protective role and help our body fight against germs
why do we sleep/ sleep seems t be a natural reaction to tiredness, particularly physical tiredness.yet ,certain animals sleep very little .the giraffe ,for excemple sleeps three minutes every 24 houres.
can muscles move without ou wanting it?
some muscles can move without our wanting it or even thinking about it for example our heart constantly beats and we ever stop breathing ther are many involuntary movement in our body
wat is skin for?
our body is entirely covered by soft and sensitive cover that has a protective role and allows echanges with the envirronment
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2010-12-20, 22:43
every question has an answer
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