Answer:
In my life I must bare, my bloodline I must share. What am I?
What is always coming but never arrives?
You heard me before and then again. Afterward I die, until you call me again. What am I?
I transfer oxygen from the atmosphere to your blood
The person who makes me doesn't need me. The person who buys me doesn't use me. The person who uses me doesn't know it. What am I?
I flow from the Homerβs mouth when he sees doughnuts.