Pacemaker

An electronic device used to stimulate the heart and regulate the heart rhythm. Many children are attached to a pacemaker temporarily after heart surgery, in case their heart rhythm becomes abnormal. Some children need a permanent artificial pacemaker (often because of heart block), in which case the pacemaker is put in, under the skin in … Read more

Organ

A part of the body, composed of more that one tissue, that forms a structual unit responsible for a particular function (or functions), examples are The heart, lungs, liver etc

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