Muscle fibers
Medical term · M
Cells bundled together to make up muscle tissue. Also known as muscle cells.
Related terms
-
TissueA group of cells that are specialized to do a certain job and are joined together to form a body structure, such as muscle or kidney.
-
Fast-twitch fiberOne of two main types of skeletal muscle fibers. Fast-twitch fibers are recruited most heavily when bursts of power are needed, as in sprinting. See also slow-twitch fiber.
-
FibrillationRapid and uncoordinated contractions of heart muscle fibers. When this occurs, the heart can't properly contract or pump blood.
-
Motor neuronA nerve cell that directs activity in a specific group of muscle fibers.