For example, it controls digestion, respiration, the contractions of the heart and of smooth muscles in blood vessels, and the release, by the endocrine system, of hormones which regulate metabolism and growth. Hormones themselves can influence behaviour by their effects on specific parts of the brain.
Hematuria is also common in older men due to the use of certain medications or prostate enlargement. Blood in urine may occur due to infection, inflammation, or injury to the urinary system. Small amounts of blood are typically associated with kidney damage, while lower urinary tract conditions lead to gross hematuria. Kidney and ureter stones commonly cause hematuria in individuals younger than 40 years of age.
What is blood in the urine? Sometimes blood in the urine can be seen, but at other times it is present in such small quantities that it is not visible to the naked eye. A simple test can detect even tiny amounts of blood; it is a routine test, carried out at many medical examinations. Blood in the urine has various possible causes: 1. Urinary infection (cystitis) This is much the most common cause, particularly in young women. If the red urine coincides with symptoms of cystitis and disappears in a few days when the infection is treated, it is usually attributed to infection and no further tests are carried out. The other symptoms of cystitis are: 1  burning feeling on passing water. 2  feeling the need to pass urine more often. 3  feeling that the bladder has not been emptied. 4  sometimes a fever and feeling unwell.