Blastocoel vs Archenteron?

[BrazilianRider]

What's the difference?

Only thing I can think of is that the blastocoel is fluid-filled and found in the late morula/blastula stages and the archenteron is the now-drained cavity which is exposed to the outside world via the blastospore in gastrulas...

Is this right?

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[Daneosaurus]

I'm fairly certain you are correct.

Edit: Thanks, for posting this by the way. It prompted me to read up on repro/development. I'm still sure you are correct with your blastocoele/archenteron distinction.

 

[studyingtoo714]

Any confirmation on this. Because from the diagrams it seems to me that the archenteron is the now-drained cavity BUT the blastocoel looks like thin film (a according to wikipedia blastocoel is a fluid-filled cavity). Any confirmation on this would help

 

[kimball]

Morula (solid ball of cells) -> Blastula (hollow ball of cells) -> Gastrula (invagination of the blastula to form three cell layers [think of pushing your finger into a ballon])
Blastocoel is the inside of the blastula which is hollow and fluid-filled
Once the Gastrula invaginates it forms a cavity the is called the archenteron and the opening of this cavity is called the blastopore

 

[studyingtoo714]

That helps clarify it. Thank you Kim