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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A plastid is an organel that is found in the cells of plants, algae, and some other eukaryotic organisms. There are three kind of plastids; chloroplast, chromoplast, and leucoplast.
Plastids contain pigments which is used in photosynthesis and the colour pigments that determine the colour of plant.
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Independent is hormone and dependent is the weight
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X is horizantal and Y is vertical
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