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The Nervous System

Across
A network of nerves or vessels in the body
Any of the cells in the peripheral nervous system that produce the myelin sheath around neuronal axons
The long threadlike part of a nerve cell along which impulses are conducted from the cell body to other cells
Clear watery fluid which fills the space between the arachnoid membrane and the pia mater
The three membranes that line the skull and vertebral canal and enclose the brain and spinal cord
Insulating layer that forms around nerves, including those in the brain and spinal cord made up of protein and fatty substances.
Nerves that carry signals toward the central nervous system from the periphery
An area of skin that is mainly supplied by afferent nerve fibers from a single dorsal root of spinal nerve which forms a part of a spinal nerve
Down
One of many terminal endpoints on a neuron's axon
Any of several types of cell that function primarily to support neurons, means “nerve glue.”
A chemical substance that is released at the end of a nerve fiber by the arrival of a nerve impulse and, by diffusing across the synapse or junction, causes the transfer of the impulse to another nerve fiber, a muscle fiber, or some other structure
A structure containing a number of nerve cell bodies, typically linked by synapses, and often forming a swelling on a nerve fiber
An abnormal sensation, typically tingling or pricking (“pins and needles”), caused chiefly by pressure on or damage to peripheral nerves
A short branched extension of a nerve cell, along which impulses received from other cells at synapses are transmitted to the cell body