Assertion: embryo's cell | /r/HasProperty | developed as the first
Facets:
value: recently
type: TEMPORAL
value: in vivo test-bed
type: OTHER
Source sentences:
text: The multiciliated cells of the Xenopus epidermis have recently been developed as the first in vivo test-bed for live-cell studies of such ciliated tissues, and these studies have provided important insights into the biomechanical and molecular control of directional beating.