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 wedding ring symbolizes love, fidelity and marital commitment to each other. A wedding ring is often worn on the left ring finger, which is the fourth finger from the thumb of the left hand. But in some countries like Bulgaria, Norway, Germany, Poland and Russia it is worn on the right ring finger. In the 17th century the thumb was the wedding ring finger in England.