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Animals

Across
An organism that doesn't have mesoderm tissue
Hollow ball of cells
Phyla that includes arthropods and nematodes
Main component in connective tissue.
Echinoderms and chordates
Organisms with mesoderm lined body cavities
Phyla that includes flatworms and mollusks
Organisms with no body cavities
The invagination of the blastopore
Alexi's favorite microscopic animal (with a cute little spinning head).
Conserved sequences of DNA that regulate development
Blastopore becomes the mouth
Outer layer of cells
Down
______ symmetry is an organism that is symmetrical in a single plane
The type of cell division without growth
An organism that has all three tissue types.
Phyla that includes sponges
Blastopore becomes the anus.
Embryonic gut
Phyla that includes jellies and coral
Internal cavity of the hollow ball of cells
______ symmetry is an organism that is symmetrical in all planes.
_____ explosion is the rapid appearance of animals in the fossil record
Tissue lining the gut
Fluid filled body cavity