Plural of ectoderm; multiple instances or variations of the outermost embryonic germ layer.
From 'ectoderm' + '-s' (plural). This straightforward plural form allows biologists to discuss multiple embryos, species, or comparative ectodermal structures in academic discourse.
When embryologists compare ectoderms across different species—from fish to humans to octopuses—they can trace which traits are preserved and which are radically different, revealing evolution's common blueprints.
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