Here's why:
* Cellular Respiration: When glucose is broken down, energy is released in a series of chemical reactions. The primary goal of cellular respiration is to generate ATP, the energy currency of cells.
* Efficiency: While cells are remarkably efficient at converting glucose into ATP, they are not perfect. Some energy is inevitably lost as heat due to the laws of thermodynamics.
* Heat Production: This heat contributes to the overall body temperature, helping to maintain homeostasis. In some cases, like shivering, the body increases heat production to warm itself.
Important Note: While 62% of the total energy is lost as heat, it's important to remember that this is still a significant amount of energy.
