Which layer of fat deposition occurs last in the general order?

The layer of fat deposition that occurs last in the general order is subcutaneous fat. This type of fat is located just beneath the skin and serves as an insulator as well as a reserve of energy. During the growth and development of an animal, fat deposition tends to follow a specific sequence. Initially, fat is deposited in areas that are critical for the animal's immediate energy needs and overall health, such as around the organs, which includes perinephric fat (around the kidneys) and mesenteric fat (surrounding the intestines). Intramuscular fat, which is found within the muscle itself, is also deposited earlier to enhance energy reserves for muscle activity.

As these earlier sites become filled with fat, the animal’s body then starts to deposit fat more peripherally. Subcutaneous fat is laid down last because it serves as a protective layer and energy store. The accumulation of subcutaneous fat is also a sign of finishing in livestock, indicating that the animal has reached a stage of growth where it is ready for market. The timing of fat deposition is regulated by genetic and hormonal factors, and subcutaneous fat accumulation often occurs when the animal is approaching its mature body weight and overall fat condition.