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 band goes closer to the hand than the engagement ring on the LEFT HAND.... Ring Finger the one next to your pinkie finger. In Western cultures a wedding ring is traditionally worn on the ring finger.