Nervous System

Nervous System
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Oписание продукта

Product model: EYZ008
Product size: 30*20*10cm
Package size: 35*20*20cm
Packing weight 2.0kg
The spinal nerve sumal nerves is 31 pairs, is connected to the spinal cord, distributes in the trunk, the ventral side and the extremities muscle, is in charge of under the neck the sensation and the movement.
The morphology of the spinal nerve
Each spinal nerve is connected to the spinal cord by the anterior root ventral root and the posterior root dorsal root. The anterior and posterior roots are made up of a number of nerve fiber bundles. The anterior root is moving, the posterior root is sensoraminal and the posterior root is slightly thicker than the anterior root. The two of the posterior roots synthesize a spinal nerve trunk at the intervertebral foramen, and the sensory and motor fibers are mixed in the trunk.
The posterior root has an elliptical expansion near the intervertebral foramen, called the spinal ganglion sumal ganglia. 31 pairs of spinal nerves include 8 pairs of cervical nerve cervical nerves, 12 of the thoracic nerve thoracic nerves, 5 to lumbar nerves of the lumbar nerve, 5 to the sacral nerve sacral nerves, and a pair of tail nerve coccygeal nerve. First cervical nerve trunk through the vertebral canal between the atlas and occipital bone, second to 7 cervical nerve trunk through the same ordinal cervical intervertebral foramen through the vertebral canal, eighth neck nerve trunk through the seventh cervical intervertebral foramen through the 12 to the thoracic nerve trunk and 5 pairs of lumbar nerve through the same ordinal intervertebral foramen through the intervertebral foramen, first to 4 sacral nerve pass. The sacroanterior and posterior holes pass through the same ordinal number, and the fifth sacral and caudal nerves pass through the sacral canal hiatus. Because the spinal cord is short and the vertebral canal is long, the spinal nerve roots of each segment are different in the direction and length of the spinal canal. The cervical nerve root is short, the stroke is near the level, the chest is inclined downward, and the nerve root of the lumbosacral part is longer. It is near vertical in the spinal canal and forms the cauda cauda cauda equina. In the intervertebral foramen, the spinal nerve has an important adjoining relationship. The anterior part is the intervertebral disc and vertebral body, and the posterior part is the intervertebral joint and the ligamentum flavum. Therefore, spinal lesions, such as intervertebral disc prolapse and vertebral fractures, often involve spinal nerves, and have sensory and motor disorders.
Spinal and spinal nerve branching magnification model
The model consists of two parts of the spinal cord model and the spinal plane model. The enlargement design shows the stereoscopic shape of the spinal cord and the transverse section of the spinal cord, with a total of 21 indications. More conducive to the use of users
Size: 5 times magnification
The stereoscopic model of spinal cord was high 6cm, wide 20cm, and deep 5.5cm;
The spinal plane model was high 2cm, wide 8cm, and deep 6cm.
Material: environmental protection PVC paint, computer color matching, pure hand painting ensure the fineness of the product.12345678

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