what body system is edema
Types of Edema. Edema is the accumulation of abnormal levels of fluid in the circulatory system and the tissues between the bodyâs cells (interstitial tissue). This condition often causes tissue underneath the skin to swell, and is common when lymphatic blockage occurs.his excess fluid gets trapped in the bodyâs tissue in a greater capacity than the lymphatic system can eliminate. Generally, edema is physically unnoticeable until the interstitial fluid volume is approximately 30% above normal (normal fluid volume is 10%).