Final answer:
A fibroblast's leading edge extends from the cell as a broad, flattened, veil-like protrusion called a lamellipodium. Lamellipodia are dynamic structures composed of actin filaments that play a crucial role in cell migration and movement.
Step-by-step explanation:
As a fibroblast moves, its leading edge extends from the cell as a broad, flattened, veil-like protrusion called a Lamellipodium.
Lamellipodia are dynamic structures composed of actin filaments that play a crucial role in cell migration and movement. They are responsible for leading the cell during migration by forming a flat sheet-like extension.