Cell lineage of regularly developing sea urchin embryo: Na2l

Cell name

 Na2l

Cleavage number

 5

Number of cells after cleavage

 32

Cleavage direction (with respect to the A/V axis)

 horizontal

Mother cell

 Na2

Sister cell

 Na2u

Progeny

 Na2lu, Na2ll

Tier

 an2

Prospective territory

 Aboral ectoderm
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