Brown adipose tissue is present in small mammals (e.g., mice) and in newborn humans. Most of it disappears in adult humans. The cells in both types of fat are called adipocytes although they differ in origin, structure, and function in the two types of tissue.
On the left hand, index finger. It's not the index finger you wear it on. Left hand, ring finger. The finger that you would wear a wedding ring on.
The circle of the wedding Ring is also a symbol of eternity. The circle has no beginning or end and is, therefore, a symbol of infinity. Traditionally, the wedding ring is worn on the fourth finger of the left hand.