Usage examples (3)

• The parietal and visceral mesoblast, or the two middle layers, are always of later origin, and arise through evagination or plaiting of the entoblast, the remainder of...
• Then every mesoblast contracts; the contraction deepens, till it is divided across in both directions, separating thus into four parts, then into eight, then into sixteen, and...
• The following passage gives a good idea of their views and of the phylogenetic implications involved: -- "Ectoblast and entoblast are the two primary germ-layers which...