What do you understand by ECG and EEG ? What is their basis ?

Explanation

ECG stands fpr electr- encephalo graph.
Both are based on the fact that human body is a good conducter of electricity, but not a perfect conductor. Therefore, musle activity leads to small differences in electric potenitial form one point of the body to another.
As human heart beats, potential differences in the range of 1 milli volt develop. These potential differences are detected and displayed with an insturment known as ECG.
Further, nerve impulses in the brain lead to potential differences in the range of 0*1 milivolt. They are deteced and displayed with an insturment knwon as EEG.