Inside every cell, a network of tiny filaments, called the microtubule cytoskeleton, helps maintain the cell's shape, allows it to divide, and transports vital materials from one part of the cell to ...

Actin filaments are protein fibers that make up the internal skeleton of the cell. As active elements of our cells, actin filaments support the cell's fusion, movement and are involved in many other ...

Half a billion years ago, our ancestors grew a spine. The evolution of an internal skeleton marks a milestone in the history of life on Earth. From wriggly, worm-like fishes, ancient animals that ...