What is a notochord and a nerve cord? And how are they related in chordates?
Answers
Answered by
1
Notochord :
It is a solid ensheathed dorsal rod of large vacuolated cells.
It occurs in chordates.
It provides support and point of attachment to muscles.
In vertebrates, it forms the axial skeleton.
Nerve cord :
It is a bundle of nerve fibres with chains of ganglia, generally running ventrally
It occurs in invertebrates.
It gives rise to peripheral nerves.
It forms a major part of nervous system.
Notochord is the skeletal rod which lies lengthwise between the central nervous system and the alimentary canal or the gut and the chordates possess it at young stage of development. In adult vertebrates, it is replaced by vertebral column.
On the other hand
a nerve cord is a solid strand of nervous tissue, forming part of central nervous system, especially of invertebrates. The main difference between the two is that notochord is a part of skeleton system whereas nerve cord is a part of nervous system.
It is a solid ensheathed dorsal rod of large vacuolated cells.
It occurs in chordates.
It provides support and point of attachment to muscles.
In vertebrates, it forms the axial skeleton.
Nerve cord :
It is a bundle of nerve fibres with chains of ganglia, generally running ventrally
It occurs in invertebrates.
It gives rise to peripheral nerves.
It forms a major part of nervous system.
Notochord is the skeletal rod which lies lengthwise between the central nervous system and the alimentary canal or the gut and the chordates possess it at young stage of development. In adult vertebrates, it is replaced by vertebral column.
On the other hand
a nerve cord is a solid strand of nervous tissue, forming part of central nervous system, especially of invertebrates. The main difference between the two is that notochord is a part of skeleton system whereas nerve cord is a part of nervous system.
Similar questions