Defense Language Aptitude Battery (DLAB) Practice Test

The liver is primarily responsible for detoxification in the human body. It plays a critical role in metabolizing substances that can be harmful, converting them into harmless compounds that are more easily excreted from the body.

One of the liver's functions is to process nutrients and drugs from the bloodstream, breaking down toxins and waste products before they can cause harm. It also produces enzymes and bile, which aid in digestion and the removal of waste.

In contrast, while kidneys also filter blood and can remove waste products and excess substances, their main function is to regulate the body's fluid balance and electrolytes rather than detoxification. The heart is primarily responsible for pumping blood throughout the body, and the pulmonary system deals with gas exchange, specifically oxygen and carbon dioxide, rather than detoxifying substances. This distinction highlights the liver's unique and central role in maintaining the body's internal environment through detoxification processes.