How do you now you have cells even if you don't feel any cellular activity? This is a question I was recently asked, and I had no idea what the the guy that asked me was talking about. Then, in the middle of the night, it hit me. Let me tell you this question in English, How do you know you have cells, if you can't feel them doing anything. First of all, you need cells to live. It's a must. You need them to breathe, eat, sleep move, almost everything that your body needs to do to live. One way you know for sure that you have cells, if you don't believe me, is just put your hand over the left side of your chest. Yes your heart does need cells to fuction correctly. If you can eat then you know you have cells. This is a little extreme, but if you still don't believe me, you can cut yourself and put some of your blood under a microscope and look for the cells there. That's live proof right there, you can't argue with it. Well, this is what I hope is the correct answer to your question, person who asked me the qeustion. Make sure to check out my other science blogs!