An early stage of embryonic development in which the embryo is a hollow sphere of cells with a primitive body cavity.
From coelo- (hollow, relating to cavity) + blastula (early embryo). A technical embryological term combining anatomical and developmental terminology.
A coeloblastula is basically a ball of cells with a hollow center—one of the earliest stages of life where an embryo starts organizing itself into something that might become an animal.
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