70.0 MB (7.3 MB compressed)
6060 x 4040 pixels
51.3 x 34.3 cm ⏐ 20.2 x 13.5 in (300dpi)
CAROL & MIKE WERNER / SCIENCE PHOTO LIBRARY CAROL & MIKE WERNER / SCIENCE PHOTO LIBRARY
Blood vessel formation. Illustration showing malignant (cancerous) tumour cells (centre) promoting the formation of new blood vessels. The tumour cells release angiogenic growth factor proteins, such as vascular endothelial growth factor (VEGF), that encourage the growth of new blood vessels from existing ones. These blood vessels provide the tumour with oxygen and nutrients.
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