noun, plural: microtubules
A cytoplasmic tubule made up of polymers of alpha- and beta-tubulin dimers. It is the structural component of cytoskeleton, cilia, and eukaryotic flagella.
Structure: a tubular structure with diameter of 25 nm, length range ranging from 200 nm to 25 micrometers, and wall thickness of 5 nm.
Features: exhibits polarity and are organized by a microtubule organizing centers (e.g. centrioles and basal bodies)
Function: renders intracellular shape, and involved in locomotion and transport.
Location: cytoplasm of most cells.
Word origin: Greek mīkrós (small)