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Vertebrates and invertebrates

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Vertebrates and invertebrates

Postby Gaeilge » Tue Nov 04, 2008 8:18 pm

what are the main differences? i dont want to hear anything unhelpful
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Postby mith » Tue Nov 04, 2008 8:48 pm

lookup the wikipedia entries and compare.
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Postby MichaelXY » Wed Nov 05, 2008 1:42 am

Vertebrates have more back aches.
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Postby Darby » Wed Nov 05, 2008 2:19 am

It's a very artificial designation.
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Postby MrMistery » Wed Nov 05, 2008 2:21 am

first of all, the opposite of invertebrate is not vertebrate, it is chordate.
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Re:

Postby MichaelXY » Wed Nov 05, 2008 3:03 am

MrMistery wrote:first of all, the opposite of invertebrate is not vertebrate, it is chordate.


I would think arthropods would be a better opposite.
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Postby nova707 » Sat Dec 05, 2009 8:15 pm

a vertebrate is any animal with a stiff vertebral column present. Both vertebrates and invertebrates have a notochord: a flexible stiffening rod that they retain as adults
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Postby Darby » Mon Dec 07, 2009 12:42 am

Only chordates have notochords (some vertebrate, some not) - the vast majority of animals don't.
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Postby nova707 » Mon Dec 07, 2009 1:33 am

Thanks for the clarification
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Postby Darby » Thu Dec 10, 2009 5:58 pm

Oh, and the vast majority of vertebrates only have a notochord in the early embryo stage - it kind of causes the formation of the brain and spinal cord, then breaks down.
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Re: Vertebrates and invertebrates

Postby Chroma » Fri Dec 11, 2009 9:26 am

its kind of funny to compare vertebrates to invertebrates as the vertebrates are a single body design while inverts are comprised of a variety of alternative forms... A fair comparison would be apples to all other fruits. Basically to look at the comparison it would be more effective to read what traits are unique to vertebrates (or chordates, the phylum) as was mentioned.

The most basic list for chordates is:
Endostyle (becomes thyroid gland in the more derived forms)
Post Anal Tail (though some have lost theirs, though a vestigial structure usually still remains)
Notochord (for movement or other functions in other chordates)
Pharyngeal slits (become a variety of other structures like gills)
Dorsal Nerve Chord (the spinal chord and brain in vertebrates)

There are more specific features for vertebrates; lensed eyes (similar to gastropod and annelid eyes), jaws on all but the agnathans, an endoskeleton, etc... and for most of them there is invertebrate group(s) that share similar features..
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Re: Re:

Postby jwalin » Sat Dec 12, 2009 9:03 am

MichaelXY wrote:
MrMistery wrote:first of all, the opposite of invertebrate is not vertebrate, it is chordate.


I would think arthropods would be a better opposite.

wouldn't annelid be a better opposite?
or rather let it go down to monera groups :wink:
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