what is spinal cord explain with function
Answers
Spinal cord:
1.Spinal cord extends from the back of the hind brain(Medulla oblongata) to the back of the stomach or lumbar region, through the neural canal of the vertebral column. It is almost cylindrical in shape.
2.Unlike the brain, the white matter is towards periphery while grey matter is towards the center of the spinal cord.
3.The myelinated axons leave the spinal cord from both sides of the vertebral column.
4.The role of the spinal cord in nervous control was studied largely by the experimentalists of the sixteenth and seventeenth centuries.
5.They found that the Greeks concept of control by the brain was erroneous.
6.Animals were shown to have the ability to respond to stimuli even when the brain was removed.
7. 'Leonardo da Vinci' (1452-1519) and Stephen Hales' (1677-1771) both recorded the survival of frogs whose brain had been destroyed.
8.The animal still produced muscular movements if its
skin was pinched or pricked.
9.Both observers further recorded that the animal died as soon as spinal cord was damaged by pushing a needle
down it.