Activity 3: Identify the parts of the spinal cord in spinal cord cross section model:

Spinal Cord Cross Section Parts Description / Function.

Grey Matter

White Matter

Central Canal

Dorsal Root

Dorsal Root Ganglia

Ventral Root

Spinal Nerve

Expert Solution

Spinal Cord Cross Section Part	Description	Function
Grey Matter	Contains nerve cell bodies, dendrites and axonal terminals of neurons. Mostly unmyelinated. Butterfly shaped, central region of grey matter sorrounds central canal.	The anterior grey column are responsible for movement of muscles. The posterior Grey column contain the points where sensory neurons synapse.
White Matter	Consists mostly of glial cells and myelinated axons. White because of the myelin that surrounds the nerve fibers.	It is the tissue through which messages pass between different areas of grey matter within the nervous system.
Central Canal	Central canal is a fluid-filled space in the spinal cord .	Has a protective function and allows for nutrient transport.
Dorsal Root	Emerges from the posterior part of the spinal cord. Lateral division of the dorsal root contains lightly myelinated and unmyelinated fibres of small diameter.	Carry pain and temperature sensation, transmit information of discriminative touch, pressure, vibration.
Dorsal Root Ganglia	Lie in the intervertebral foramina. Have a cell body with two branches that act as a single axon.	Nerve endings of dorsal root ganglion neurons have a variety of sensory receptors for mechanical, thermal, chemical, and noxious stimuli.
Ventral Root	Is attached to the spinal cord by a series of rootlets that emerge from the ventrolateral sulcus of the spinal cord.	Contains outgoing, efferent fibers that carry information destined to control motor or glandular function.
Spinal Nerve	Formed from the combination of nerve fibers from its dorsal and ventral roots.	The dorsal root is the afferent sensory root . Ventral root is the efferent motor root and carries motor.

The parts of the spinal cord are as:

Spinal nerve
Central Canal
White Matter
Grey Matter
Dorsal Nerve
Dorsal Nerve Ganglia
Ventral nerve

gladiator answered 2 years ago

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