Grip your left hand firmly with your right hand. Open and close the left palm a few times to pump the blood out of the left palm. Now hold the grip for a minute and watch and feel.
This was our experiment to see what happens when our hand is starved of blood. Children found interesting things - as the blood flows out the hand freezes, you can't open the fingers. The palm looks white as the blood is drained out. The hand becomes cold as the energy production is shut down. Fingers feel numb as neurons are starved of oxygen and energy.
Children found it unbearable after one minute. Now free the left hand and watch. Children observed - the palm immediately blushes red as the blood rushes in. It feels hot as the oxygen burning and energy production starts. The hand now feels heavy due to rush of extra-blood. Tingling continues for some time till neurons start working again. It takes another minute before the hand feels normal again.
Children wrote down their experience and the experiment. Their first-hand experience of why blood is important to our body. We begin study of human circulatory system.
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