cells, stage, formation, embryo, embryos, forms, margin, stages, spreads, nuclei, map, layer, cell, surface, increases, fig, edge, uppermost, lies, cuticle, epithelium, arises, rise, pieces, expansion, results, show, converge, vesicle, divisions, averages, wall, invaginates, meeting, recombination, turns, savvy, divide, proceeds, segmentation, separates, plate, rests, thickens, peripheral, expands, cellularization, epiboly, push, enhancers, layers, polyribosomes, membrane, elongates, beginning, traces, one, identities, downwards, cultures, divides, fold, cavity, con

early, cellular, unincubated, embryonic, avian, entire, whole, young, syncytial, layered, primitive, original, older, explanted, mammalian, single, circular, extraembryonic, undifferentiated, cultured, late, dorsal, flat, sac, trilaminar, hour, superficial, haemal, cephalic, normal, mental, unicellular, chick, uniform, zebrafish, like, elasmobranch, syncitial, segmented, unilaminar, future, vesicular, attached, abdominal, vertebrate, definitive, pig, ciliated, continuous, typical, lateral, intact, tiny, fresh, thickened, recipient, day, shaped, called, marginal, somite, nonincubated, incubated, spheroidal, adjacent, sectioned, reptilian