Figure 8: The left panel shows the results from our simulation of a calcium wave using the Finite Element method. Parameters in equations (15) and (16) are given by r = 0:0075µM, V1 = 0:45µ M s-1, k1 = 0:9µM, V2 = 2:275µMs-1,k2 = 2µM, k3 = 0:9µM, k = 0:04s-1, kf = 0:005s-1, Dc = 50µms-2, l = 2, m = 2 and p = 4. Cytosolic and stored calcium are set up at their equilibrium values c = 0:1666 M and cr = 2:92M in almost all the domain, except by a perturbation in the first one of value 1:3µM in the upper left part of the cell. We have used zero flux boundary conditions. Images are taken every 4 sec. Red and blue correspond to maximum and minimum of cytosolic calcium concentration respectively. The right panel correspond was taken from Reference [51] and shows an experimentally observed calcium wave within a sea urchin egg.