Human Vertebral And Partial Spinal Cord, Superior

Quick Answer: The human vertebral and partial spinal cord, superior, is a higher-grade version of the vertebrae and spinal cord model, showing a short length of spine with the cord inside it. As a spinal cord and vertebrae model it is used to teach the internal structure of the cord, its protective coverings and how spinal nerves are formed.

Inside the Spinal Cord

In this range superior appears to denote a higher grade of finish or detail, not the upper part of the spine. The listing does not say what it adds over the standard vertebral and spinal cord model, but the subject is the same: a few vertebrae with the spinal cord and nerve roots in place.

A cut end of the spinal cord shows its two regions. The central grey matter, shaped like a butterfly or the letter H, contains nerve cell bodies: its posterior horns receive sensory input and its anterior horns hold the motor neurons that drive skeletal muscles. Around it, white matter carries ascending and descending tracts to and from the brain. Dorsal roots, each with a ganglion of sensory cell bodies, and ventral motor roots unite to form each spinal nerve.

The cord is wrapped in three meninges: the tough outer dura mater, the delicate arachnoid mater and the pia mater clinging to the cord surface. Cerebrospinal fluid fills the subarachnoid space between arachnoid and pia and cushions the cord. Because the cord stops high in the lumbar region, fluid for testing can be drawn lower down with little risk of reaching it.

Specifications

Applications

• Explaining the reflex arc and the layout of grey and white matter in biology and physiology
• Explaining the meninges and cerebrospinal fluid to nursing and paramedical students
• Showing how dorsal and ventral roots form a mixed spinal nerve
• Relating the level where the cord ends to lumbar puncture sites in medical teaching

Care & Handling

• Keep the spinal cord and vertebrae model away from rough handling; the thin meningeal layers and roots are the parts that break.
• Clean it with a dry, soft brush rather than a cloth, which can catch on the nerve roots.
• Store it in its box or on a covered shelf so dust does not settle in the vertebral canal.

Why Choose LabEquip

Medical colleges and nursing schools often want the extra detail of a higher-grade spinal model for neuroanatomy practicals. LabEquip lists it with its biology lab products, and the human nervous system model shows where the cord’s nerves travel; ask through the contact page about the superior features.

Frequently Asked Questions

What does superior mean in this listing?

It appears to be a grade name for a better-finished or more detailed version, not a reference to the upper spine. The listing does not define the extra features, so they are worth having confirmed when you enquire.

What is the difference between grey and white matter?

Grey matter contains nerve cell bodies and synapses and lies in the H-shaped centre of the cord. White matter surrounds it and consists of myelinated nerve fibres running up and down the cord.

What are the dorsal and ventral roots?

Sensory fibres enter the cord through the dorsal root, whose cell bodies sit in a small swelling called the dorsal root ganglion; motor fibres leave through the ventral root. Just outside the vertebral canal the two roots merge into a single spinal nerve.

What are the meninges?

From outside inwards they are the tough dura mater, the web-like arachnoid mater and the delicate pia mater, which is fused to the surface of the cord. Cerebrospinal fluid circulates in the subarachnoid space between the arachnoid and pia.

How does a spinal reflex work?

A sensory neuron carries a signal from a receptor and enters the grey matter via the dorsal root, where it connects, often through a relay neuron, to a motor neuron that leaves through the ventral root to a muscle. The response happens before the brain is aware of it.

Why is lumbar puncture done low in the back?

The adult spinal cord ends near the first or second lumbar vertebra, so a needle inserted below that level, commonly between the third and fourth or fourth and fifth lumbar vertebrae, reaches cerebrospinal fluid with little risk to the cord.

Last Updated: September 2026