In the 3rd century bc the egyptians used their body parts to measure things. Why do you think peoplebinvented measurement system if body parts can be used to measure? PLEASE ANSWER IT I REALLY NEED THANKYOU ​

In order to have an accurate measurement system, humans would’ve had to have created one. Although body parts could be used to measure things, the lengths would’ve been different everytime. This is because no human’s body part is the exact same length as another’s. Everybody’s bone structure is different so in order to create a universally correct measurement system, humans had to invent a new one.