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This web page tumorbrain.blogspot.com states the following, "What You Need To Know About Brain." We saw that the webpage said " The brain is a soft, spongy mass of tissue." It also said " It is protected by the bones of the skull and three thin membranes called meninges. Watery fluid called cerebrospinal fluid cushions the brain. This fluid flows through spaces between the meninges and through spaces within the brain called ventricles. Illustration shows the skull, spinal cord, brain, meninges, ventricles, the fluid between the meninges, and the fluid in the ventricles. The brain and nearby structures." The header had brain cancer as the highest ranking optimized keyword. It is followed by tumor, Astrocytoma, and carmustine which isn't as ranked as highly as brain cancer. The next words tumorbrain.blogspot.com used was cerebellum. chemical was included but will not be viewed by search engines.