AL(right)

Cell lineage of regularly developing sea urchin embryo: AL(right)

Cell name	AL(right)
Cleavage number	1
Number of cells after cleavage	2
Cleavage direction (with respect to the A/V axis)	vertical
Mother cell	zygote
Sister cell	OL(left)
Progeny	A, L(right)
Tier
Prospective territory