Question

what is notuchord ? state its
use.​

Answer 1

THE NOTOCHORD IS THE DEFINING STRUCTURE OF THE CHORDATES, AND HAS ESSENTIAL ROLES IN VERTEBRATE DEVELOPMENT. IT SERVES AS A SOURCE OF MIDLINE SIGNALS THAT PATTERN SURROUNDING TISSUES AND AS A MAJOR SKELETAL ELEMENT OF THE DEVELOPING EMBRYO.

THE NOTOCHORD IS THE DEFINING STRUCTURE OF THE CHORDATES, AND HAS ESSENTIAL ROLES IN VERTEBRATE DEVELOPMENT. IT SERVES AS A SOURCE OF MIDLINE SIGNALS THAT PATTERN SURROUNDING TISSUES AND AS A MAJOR SKELETAL ELEMENT OF THE DEVELOPING EMBRYO.

Answer 2

Question:-

$\dag$ What is notochord? State its use?

Answer:-

➡Definition

• A rodlike code of cells that the chief axial supporting structure of the body of the lower chordates as amphioxus and the cyclostomes and of the embroys of the vertebrata.

➡uses

• Notochord is the defining structure of the chordates and has special role in vertebrate development.
• It serves as a source of midline signals as the pattern surrpunding the tissues and as a major skeletal element of the development of embreyo.

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➡functions and notochord in human.

• Notochords are thought to be advantageous through providing a rigid and flexible structure for muscle attachment.
• In some chocolates it persist thoroughout the life as the main structural support of the body, while in most vertebrate it developed into the nucleus pulposus of the invertrable disc.

➡when notochord removed.

• In the absence of neural tube notochord somitic cells die rapidly, and so the neural Crist cell that are present in the somitic mesenchyma at that time in the contrast of the notochord is left in situ and neural tube is removed the spinal ganglia fail to differentiate and only sympathetic ganglia can develop.

✒See the attachment for figuration