Blastula Comparison

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Blastula Comparison

• Urchin, Frog, and Chick

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Comparison Between Frog and Sea Urchin
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Chick Blastula/ Blastodisc
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Synopsis

• Sea urchins have a bigger Blastocoel, and have
  Mesenchyme cells.
• The blastocoel of the frog is off-center and
  surrounded by a wall that is more than one cell
  thick.
• Chicks have a blastodisc which involves the
  blastocoel, epiblast and hypoblast. The
  Blastodisc grows off of the yolk mass.
• The chick, urchin and frog all have a blastocoel