Question

name the skeletal parts of branchiostoma​

Answer 1

Answer:

In Branchiostoma, exoskeleton is not found. But a few endoskeletal structures are present which are not cartilaginous or bony.

Notochord:

There is a cylindrical and tapering notochord at both the ends, remarkable for its extension from the tip of the rostrum to the end of the tail. It lies immediately above the alimentary canal and between the left and right myotomes. It is formed of large alternate fibrous and gelatinous, vacuolated cells and having the nuclei confined to its dorsal and ventral regions. Around these cells is a structure less layer, secreted by the cells, enclosed in a notochordal sheath of connective tissue.

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