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.
Leg and feet swelling that occurs with diseases of the heart, liver and kidneys is caused by salt retention holding excess fluid in the body, states MedicineNet. Edema is a normal response of the body to inflammation or injury and it is also caused by medical problems, notes WebMD. Keep Learning.