See a movie illustrating wounded cells releasing signaling molecules causing a wave of calcium signaling

This false-color movie, acquired by means of confocal microscopy, illustrates long-range calcium signaling in an embryo of the African clawed frog (Xenopus laevis). In the movie, cells are wounded with a laser (bottom-left), causing them to release signaling molecules that are sensed by adjacent cells. The signals, in addition to changes in tension across the embryo, cause a wave of calcium signaling to spread outward from the wound site. Calcium signaling helps coordinate cellular and tissue responses needed for wound repair in the frog embryo.