Notochord?

[Jab1113]

Ive read KBB and also did some research on wikipedia but does anyone have an easy way of remembering which phylums contain one, whether they did have one or not in development?

And whats the difference between notochord and spinal cord....

Im lost 😕

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[Clancyp]

Molluscs (clams, etc) Echinoderms (star fish, sea urchins, etc) Platyhelminthes (microscopic worms, etc) Arthropoda (insects, etc) are all invertebrates. Notochords are unique to the phylum chordata

 

[Jab1113]

Molluscs (clams, etc) Echinoderms (star fish, sea urchins, etc) Platyhelminthes (microscopic worms, etc) Arthropoda (insects, etc) are all invertebrates. Notochords are unique to the phylum chordata

So whats with the Tunicate? It has a notochord but is considered invertebrate?

 

[AllahIsGreater]

So whats with the Tunicate? It has a notochord but is considered invertebrate?

Salam Alakom dude. yep tunicates and ampheoxus are chordates that have no notochord. they are the two exceptions

 

[Blue87Fiero]

Vertebrates have vertebral column not to be confused with a notochord. Vertebral columns develop from the notochord. The spinal chord would develop from the dorsal hollow nerve chord. lancelets, tunicates, and Myxini only have notochords but no vertebral column. not sure if that helped at all

to distinguish notochord from spinal cord

Notochord is to vertebral column as dorsal hollow nerve chord is to spinal chord

someone correct me if I am wrong about anything

 

[Jab1113]

Salam Alakom dude. yep tunicates and ampheoxus are chordates that have no notochord. they are the two exceptions

Salam brother.

So the tunicates have a notochord during early development but when they turn into adults, they lose it?

Is that right?

 

[Troyvdg]

Salam brother.

So the tunicates have a notochord during early development but when they turn into adults, they lose it?

Is that right?

correct 👍