Final answer:
Jennifer is suffering from a severe urinary tract infection affecting her urinary system, including organs such as the kidneys, ureters, urinary bladder, and urethra. White blood cells in her urine indicate inflammation and infection.
Step-by-step explanation:
Jennifer's symptoms of uncontrollable and painful urination, presence of blood in the urine, and the findings of white blood cells upon urine analysis indicate that she is experiencing a severe urinary tract infection (UTI). The systems involved are primarily the urinary system and potentially the circulatory system if the infection spreads. The organs of each system affected include the kidneys, ureters, urinary bladder, and urethra, which are all parts of the urinary system responsible for urine production, storage, and excretion. The kidneys filter waste from the blood creating urine, which travels to the urinary bladder via the ureters and is eventually expelled through the urethra. The presence of blood and white blood cells in the urine suggests inflammation, usually associated with an infection, affecting these organs.