Answer:
I shrink smaller every time I take a bath.
I run up and down the stairs without moving. What am I?
What can go up a chimney down but canβt go down a chimney up?
I transfer oxygen from the atmosphere to your blood
I am so delicate that even mentioning me breaks me. What am I?
Long and slinky like a trout, never sings till it's guts come out.