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Poem on friendship

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Friendship  When I am lonely I feel sad by this tension I think I will be mad I thought that friend were nothing But today i realize that they are everything Sometimes when I am lonely I feel boar But,today i know that we need Friends more and more I feel my life is locked in prison  the breaking of friendship is only the reason today I sit and cry so,  I think it's better to die
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State Archimedes' principle with diagram | deeps knowledges

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 Heart  Heart main part of the blood circulation system. It is roughly conical in shape and located in the middle of the chest cavity. It is made up of thick cardiac muscles.  it is covered by a double-walled membranous sac called pericardium.  In this sac,  there is a liquid called pericardial fluid which protects the heart from shock. The human heart consists of four Chambers. The Upper to Chambers are auricles and lower two chambers are called ventricles. The Heart is divided into left and right part by spectrum. Two large veins called superior vena cava and inferior Vena cava opens to right auricle. A valve named tricuspid valve is present between the right auricle and right ventricle. It lets the blood flow from the right auricle to right ventricle but not in the opposite direction. Pulmonary artery originated from the right ventricle and growth towards the lungs. The pulmonic valve is present between the Pulmonary artery and right ventricle. ...
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