What is the term for the loss of water from the tissues of the body?

The term for the loss of water from the tissues of the body is dehydration. Dehydration occurs when the body loses more fluids than it takes in, which can lead to a deficiency of water in the tissues, resulting in various physiological issues. This condition can arise from factors such as insufficient fluid intake, excessive sweating, vomiting, diarrhea, or certain medical conditions. Understanding dehydration is crucial for recognizing signs and symptoms that require prompt medical attention, as it can affect the body's functioning and balance essential electrolytes.

The other terms listed refer to different concepts. Overhydration and hyperhydration denote conditions where there is an excess of water in the body, leading to potential complications such as fluid overload or electrolyte imbalances. Malnutrition refers to inadequate nutrition and does not specifically focus on water loss. Therefore, dehydration is the accurate term describing the specific loss of water from body tissues.