More. 1  Oxygen Levels and Brain Function The brain consumes about 25 percent of a personâs oxygen intake, so proper brain function requires enough blood oxygen. 2  How Oxygen Affects the Heart The heart is a key player in making sure oxygenated blood travels to the organs and tissues that need it.
What are signs or symptoms of kidney cancer? Unfortunately, kidney cancer rarely causes visible signs or symptoms in its early stages. In the later stages, the most common sign of both renal cell and transitional cell cancers is blood in the urine (hematuria).
Bladder cancer signs and symptoms may include: 1  Blood in urine (hematuria) â urine may appear bright red or cola colored. Or urine may appear normal, but blood may be detected in a microscopic examination of the urine. 2  Frequent urination.  Painful urination.