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Product model: ESJXT001
Product size: 67*20.5*7.5cm
Package size: 70*30*10cm
Packing weight: 10kg
Autonomic nervous system autonomicnervoussystem the terminal nervous system of vertebrates is differentiated and developed by somatic nerves, forming a functionally independent nervous system. Single or mainly composed of the efferent nerve, controlled by the brain, but has more independence, especially the independent activity that is uncontrolled. Therefore, J.N.Langley1905 is named the autonomic nervous system, in addition to the unvoluntary nervous system or the plant nervous system.
Sympathetic nerve
The sympathetic nerve is part of the plant\'s nerve. It is composed of the central part, sympathetic trunk, ganglion, nerve and nerve plexus. The central part of the spinal cord is located in the 1~3 lateral gray matter lateral horn of the thoracic spinal cord and the lumbar spinal cord. Sympathetic trunk is located on both sides of the spine. It is composed of sympathetic trunk ganglion and intersegmental branches. It can be divided into 5 parts: neck, chest, waist, sacrum and tail. An activity that regulates the heart and other visceral organs. The activity of the sympathetic nervous system is more extensive. The stimulation of the sympathetic nerve can cause the abdominal viscera and the contraction of the end of the skin, the strengthening and acceleration of the heart, the increase of the pupil and the increase of the working ability of the tired muscles. The activity of sympathetic nerve mainly guarantees the physiological needs of the body when it is tense. Under normal circumstances, the sympathetic and parasympathetic functions of the human body are in balance with each other.
It is a part of the vegetative nerve, which is divided into the brain and the sacrum. The central part of the brain is located in the brain stem, which is commonly called the parasympathetic nucleus. The fibers run in third, seventh, ninth and 10 pairs of cranial nerves. The surrounding ganglia have organs and the internal organs. The preganglionic fibers of the cranial parasympathetic nerves send out postganglionic fibers to the dominant organs after exchanging neurons. The center of the sacral region, located in the middle sacral nucleus in the 2~4 segmental caudal gray matter, sends out the accessory ganglion and internal organs of the organ wall near the viscera, and forms the pelvic nerve, which dominates the digestive tube, the pelvic organs and the external genitals below the descending colon. Stimulation of the parasympathetic nerve can cause cardiac arrest, increased secretion of digestive glands, pupillary dilation, and bladder contraction. It mainly maintains the physiological needs of quiet.
ENOVO positive neurologic model
The model shows the whole structure of the autonomic nervous system. The autonomic nervous system is composed of sympathetic and parasympathetic nerves. The sympathetic nerve in the model is yellow and the parasympathetic nerve is white. There are 53 signs in the model.
Size: 2/3 for natural size.123456


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