Mitochondria under the microscope. Microscopes have been crucial for our understanding of mitochondrial structure and function. Mitochondria are visible under the light microscope although little detail can be seen.Transmission electron microscopy (left) shows the complex internal membrane structure of mitochondria, and electron tomography (right) gives a three-dimensional view.itochondria under the microscope. Microscopes have been crucial for our understanding of mitochondrial structure and function. Mitochondria are visible under the light microscope although little detail can be seen.
Splenomegaly: Abnormal enlargement of the spleen. Splenomegaly is a sign of an underlying condition, such as severe liver disease, leukemia, or mononucleosis. Patients with splenomegaly should avoid activities that risk trauma to the abdomen, including contact sports, because of risk of bleeding from the injured spleen.
The spleen is a vital organ that filters and eliminates infection causing agents from the blood. It also gets rid of old, abnormal blood cells and maintains a normal supply of healthy cells. In normal conditions, the spleen is roughly the size of our fist. When it gets inflamed and swollen, the size increases considerably; and the condition is called splenomegaly. The chief symptom is pain. At first, pain is felt in the upper abdomen; it gradually extends to the left shoulder.