Figure 8.

  Response of the tumour growth predictions to variations in the various capillary nutrient concentration decay distances δ. Like the sprout tip diffusivity, the length of the affected region has no influence prior to the onset of angiogenesis. After angiogenesis occurs, large values of δ result in very large tumour sizes, while small values have little to negligible influence on tumour growth, as oxygenation of the affected region is diffusion limited. Values for the length of the affected region are given in units of mm.