Making Heads or Tails of Mitochondria

Mitochondria are known for being the batteries that power our cells, but they may also be involved in nerve cell function, according to recent research. The above image shows the tail of a zebrafish, in which mitochondria appear blue and nerve cells appear gray. By probing the role of mitochondria in these cells, researchers hope to learn about how the organelles influence the messages sent from the tip of the tail all the way to the brain.