Are urine, sweat, and tears considered body fluids?

Under normal circumstances, urine, sweat, and tears are considered body fluids. The detailed explanation is as follows:

Body fluids refer to intracellular fluid, which is the primary site of material metabolism. When nutrients taken into the body exchange substances with the external environment, they must pass through extracellular fluid to enter cells. Likewise, metabolic waste products produced within cells must move from inside the cells into the extracellular fluid before being expelled from the body. Urine is the liquid excreted from the body after the kidneys have absorbed and utilized nutrients. Sweat is a byproduct generated by human metabolism; after physical exercise, sweat secretion increases significantly, so it's important to replenish fluids—preferably with saline solution—to maintain the body’s balance. Tears are watery secretions produced by the lacrimal glands. Most tears originate from the main lacrimal glands, while a small portion comes from accessory lacrimal glands. Tear fluid contains secretions from meibomian glands and conjunctival goblet cells, as well as metabolic byproducts from the cornea and conjunctiva, all of which help protect the eyes. Since tears, sweat, urine, and similar liquids are all secreted by tissues within the body, they are classified as body fluids.

Note: If abnormal body fluid secretion occurs, it should be taken seriously. Seek medical attention at a hospital promptly to avoid delaying optimal treatment time.