Assertion: spheroid's cell | /r/CapableOf | protrude into collagen
Facets:
Source sentences:
text: Each panel shows a 20 µm Z-projection (0.2 µm steps) acquired using a 60X objective: Cells within the spheroid body approximately 20 µm from the surface (1), cells protruding into collagen (2), and cells invading through collagen (3).