a cylindrical cytoplasmic structure, ranging in diameter from 18-30 nm and consisting of the protein tubulin; provides support, structure, and transportation
Long, stiff, cylindrical intracellular structure, 20 nanometers in diameter, composed of the protein tubulin; one of the major components of the cytoskeleton, used by eucaryotic cells to regulate their shape and control their movements.
Long, cylindrical structure composed of the protein tubulin. It is one of the three major classes of filaments of the cytoskeleton.
Tubular structure involved in the maintenance of cell shape and the movements of organelles and inclusions. They also form the spindle fibres of mitosis.
a hollow tube which is found in the cytoplasm of some cells. It is mainly composed of the protein tubulin. Microtubules help cells keep their shape and divide. They also help cells, organelles and other structures inside cells to move.
(my-kro-TOO- b'you'l) one of a number of small tubular structures found inside nearly all cells
(mi'-kro-TOOB-yool) A tube-shaped component of cytoplasm composed of protein that provides support and shape for the cell.
a cellular structure, part of what is called the mitotic spindle apparatus, which normally determines cleavage direction
a hollow tube the wall of which is made largely from a spiral assembly of tubulin dimers
a polar structure, its polarity arising from the head-to-tail arrangement of the a - and b -tubulin dimers in a protofilament
A rod-like structure that in a normal cilium exists as an array of 9 doublets arranged in an outer circle around a central pair.
Gk. mikros, small + L. dim. of tubus, tube] A hollow rod of tubulin protein in the cytoplasm of all eukaryotic cells and in cilia, flagella, and the cytoskeleton.
Tiny hollow filaments within eukaryotic cells that are made of tubulin (a protein). Some microtubules give the cell its shape by acting as internal scaffolding. Other microtubules are the move proteins within cells through vesicular transport, including moving apart the paired chromosomes within nuclear DNA of cells undergoing meiosis. Microtubule proteins are present in bacterial cells and here they power flagella, the whip-like structures used by some bacteria to move; and cilia, the tiny hair-like projections that line many mucosal surfaces in humans that are used to clean mucosal surfaces by sweeping particles like dust away. Within neurons, microtubules transport mRNA from the nucleus to the ribosomes in the dendrites, where the mRNAs are translated into protein molecules.
(MY-kroh-TOO-byool) Part of the cytoskeleton; a strong, hollow fiber that acts as a structural support for the cell. During cell division, microtubules form the spindle that directs chromosomes to the daughter cells. Microtubules also serve as tracks for transporting vesicles and give structure to flagella and cilia.
A thin, tubular organelle that acts as a structural support for the cell. During cell division, microtubules form the spindle that directs chromosomes to the daughter cells.
Any of the minute tubules in eukaryotic cytoplasm that are composed of the protein tubulin and form an important component of the cytoskeleton, mitotic spindle, cilia, and flagella.
An intracellular component of the cytoskeleton which aids in cell support, intracellular transport, and cell proliferation.
Microtubules are protein structures found within cells, one of the components of the cytoskeleton. They have diameter of ~ 24 nm and length varying from several micrometers to possibly millimeters in axons of nerve cells. Microtubules serve as structural components within cells and are involved in many cellular processes including mitosis, cytokinesis, and vesicular transport.