Answer:
I transfer oxygen from the atmosphere to your blood
I have memories but none of my own whatever's on my inside is what is shown. If I'm ever different it's because you changed me I feel like a decoration here for you to arrange me.
I am enjoyed by some, despised by others. Some take me for granted, some treasure me like a gift. I last forever, unless you break me first. What am I?
I'm really blue but when you see me I'm red. You don't see me too often. I'm there for you if you're hurt.
I am a candy that looks like a shepherd’s staff.
As round as an apple. As deep as a cup. All the king's horses can't pull it up.