Answer:
Although I am still, in families I run. I continue to live on in a living one. As one continues to draw breath, I will not rust. However, when one stops drawing breath, I will become mere dust. What am I?
The more you have of it the less you see. What is it?
What begins with an E but only has one letter?
I run cold and hot, I look blue but am red. What am I?
I will disappear every time you say my name. What am I?
It has no top or bottom, but it can hold flesh, bones, and blood all at the same time.