Answer:
In my life I must bare, my bloodline I must share. What am I?
Sometimes I fly as fast as the speed of light. Sometime I crawl as slow as a snail. Unknown until I am measured but you will certainly miss me when Iām gone.
I am pronounced as one letter, written with three. I come in blue, black, brown, or grey. Reverse me and I read the same either way. What am I?
I have four wings, but cannot fly, I never laugh and never cry; On the same spot Iām always found, toiling away with little sound. What am I?
I am a certain five-letter word and become shorter when you add two letters to me. What am I?
It has no top or bottom, but it can hold flesh, bones, and blood all at the same time.