DON W. FAWCETT / SCIENCE PHOTO LIBRARY DON W. FAWCETT / SCIENCE PHOTO LIBRARY
Color enhanced transmission electron micrograph of intrinsic muscle from the swim bladder of the toadfish. This view shows a one-sarcomere length of sarcoplasmic reticulum in three intermyofibrillar clefts. The high development of the reticulum is related to the rapid contraction and relaxation of this muscle.
Model release not required. Property release not required.