In pumps. Flexible impeller of cooling system pump of an outboard engine. An impeller is a rotating component of a centrifugal pump, usually made of iron, steel, bronze, brass, aluminium or plastic, which transfers energy from the motor that drives the pump to the fluid being pumped by accelerating the fluid outwards from the center of rotation.
noun, plural: dorsal root ganglia. (neuroanatomy) The ganglion on the dorsal root of every spinal nerve. It is where the cell bodies of sensory neurons are located; hence, it is chiefly involved in the transmission of sensory information.
From Wikipedia, the free encyclopedia. The dorsal root of spinal nerve (or posterior root of spinal nerve) is one of two roots which emerge from the spinal cord. It emerges directly from the spinal cord, and travels to the dorsal root ganglion. Nerve fibres with the ventral root then combine to form a spinal nerve.he root emerges from the posterior part of the spinal cord and travel to the dorsal root ganglion. This contains the cell bodies of the nerve fibres contained in the root. The lateral division of the dorsal root contains lightly myelinated and unmyelinated fibres of small diameter.