Ken Jones, a leading amateur microscopist, specialises in video-filming pond-life. One of his videos captures the enigmatic and graceful movement of Volvox, and he has kindly allowed us to show some extracts from his film on this page. A single Volvox colony spins through the dark waters of a pond. Daughter cells are just visible inside. Micscape Editor's note.
Heart, liver, or kidney disease. Sometimes swelling can indicate a problem such as heart, liver, or kidney disease. Ankles that swell in the evening could be a sign of retaining salt and water because of right-sided heart failure. Kidney disease can also cause foot and ankle swelling.
Salt-driven edema is associated with congestive heart failure, high blood pressure and liver diseases. To prevent the retention of fluids and the swelling that follows, sodium-restricted diet is commonly prescribed for those affected. Malnutrition can also cause edema.ome medications can also cause swelling in the legs. These drugs mostly affect the water balance in the body or cause blood vessels to leak fluids. Medications that can cause edema include: 1  Vasodilators, because they promote the widening of blood vessels.