Edema Edema Edema, also spelled oedema or œdema, is an abnormal accumulation of fluid in the interstitium, located beneath the skin and in the cavities of the body, which can cause severe pain. Clinically, edema manifests as swelling. The amount of interstitial fluid is determined by the balance of fluid homeostasis and the increased secretion of fluid into the interstitium. The word is from Greek "oídēma" meaning "swelling". The condition is also known (mostly archaic) as dropsy. Cutaneous edema is referred to as "pitting" when, after pressure is applied to a small area, the indentation persists after the release of the
Tissue hydration within the plant, reducing the rate of dehydration. Some seeds and spores remain dormant until adequate moisture is present, at which time the seed or spore begins to germinate. Animals maintain adequate tissue hydration by means of (1) an outer skin, shell, or cuticle; (2) a fluid-filled coelom cavity; and (3) a circulatory system. Hydration of fat free tissues, ratio of total body water to fat free body mass, is stable at 0.73 in mammals. In humans, a significant drop in tissue hydration can lead to the medical condition of dehydration. This may result from loss of water itself, loss