Define: Insensible water loss: Obligatory loss:

Insensible Water Loss: Insensible water loss refers to the amount of fluid lost daily from the body that is not easily measured. For example, water is lost through the skin (not sweating) and the respiratory tract during normal breathing. This type of water loss occurs without the individual's awareness, hence the term 'insensible' water loss. It is estimated that approximately 500 to 1000 mL of water is lost per day through these insensible routes.

Obligatory Loss: Obligatory loss refers to the minimum amount of water that must be excreted by the body in order to remove waste products and toxins from the body. This includes water lost through urine, feces, and expired air. The kidneys play a major role in this process as they filter out waste from the blood. The obligatory water loss is approximately 500 to 1400 mL per day, depending on various factors such as diet and climate.