According to the bell magendie law, " the ventral spinal roots transmit motor impulses and the posterior roots sensory impulses,which establish a major landmark in the history of neuroscience."
The nature and physiology of the phenomena were described independently by sir charles bell , he is British anatomical scientist and french physiologist francois magendie after that Johannes peter muller confirmed it.
The ventral roots preganglionic sympathetic fibers of the atomic nervous system exit the spiral cord with ventral roots T1 through L2. It consist predominately of efferent somatic motor fibers. There are also 31 pairs of spinal nerves and roots. Eight pairs of cervical nerves exit the cervical cord at each vertebral level.
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3D LASER SCANNER FOR PALEONTOLOGY TECHNOLOGY
1.Fish gills are organs that allow fish to breathe underwater. Most fish exchange gases like oxygen and carbon dioxide using gills either on side of the pharynx.
2.Gills are branching organs located on the side of fish heads that have many, many small blood vessels called capillaries.
3.The colour is red
4. A Gill filaments project from each arc between the dorsal upper and ventral lower surfaces of the filaments.
The viral uses the host cell to make new viral parts .
