Which organs use the most energy?

As a domain expert in human physiology, I can provide you with an informed answer to your question. The brain is indeed the organ that uses the most energy in the human body. It's responsible for a wide range of functions, from thinking and decision-making to controlling the autonomic functions of the body. The brain's high energy consumption is due to its complex network of neurons that are constantly firing and transmitting signals. This process requires a significant amount of glucose, which is the primary source of energy for brain cells. In addition to the brain, the heart is also a high-energy user because it works continuously to pump blood throughout the body. The liver is another organ that consumes a significant amount of energy, especially during detoxification and metabolism of nutrients. The kidneys also require a considerable amount of energy to filter blood and remove waste products. It's important to note that while the brain uses a large percentage of the body's energy, the distribution of energy use across different organs can vary depending on the body's current needs and activities.

It is well established that the brain uses more energy than any other human organ, accounting for up to 20 percent of the body's total haul. Until now, most scientists believed that it used the bulk of that energy to fuel electrical impulses that neurons employ to communicate with one another.