Answer:
Only two backbones and thousands of ribs.
What can run but canβt walk?
Though not a plant, has leaves. Though not a beast, has spine. Though many wouldn't need this thing, It's more valuable than wine.
A mile from end to end, yet as close to as a friend. A precious commodity, freely given. Seen on the dead and on the living. Found on the rich, poor, short and tall, but shared among children most of all.
It is an arctic double breasted formal wear.
I have two eyes in the front and a lot of eyes on my tail