Final answer:
Excess accumulation of fluid in the interstitial spaces of the body is known as edema. It can cause swelling in large areas of the body, especially the lower extremities.
Step-by-step explanation:
Excess accumulation of fluid in the interstitial spaces of the body is known as edema. Edema can be seen as swelling in large areas of the body, especially the lower extremities. It is caused by various factors such as leakage of water from blood capillaries, underlying medical conditions, use of certain drugs, pregnancy, localized injury, or allergic reactions.