Final answer:
Urine is not filtered by the urinary bladder; this is a false statement. The formation of urine actually starts in the kidneys, which filter the blood and produce urine that is then stored in the bladder before excretion.
Step-by-step explanation:
The statement that urine is filtered out of the blood by the urinary bladder is false. Instead, urine is formed by the kidneys, which filter many substances out of the blood. The kidneys are equipped with millions of glomeruli, specialized structures that filter the blood based on particle size, excluding large elements like blood cells and proteins, and allowing other solutes to pass through. These solutes are then processed in the nephrons, resulting in the formation of urine. Once produced, urine is then stored in the urinary bladder before being excreted from the body through the urethra.
Moreover, the urinary system's functions include not just the storage and excretion of urine, but also the regulation of pH and osmolarity, prevention of infection, and in males, reproductive functions. The urinary system includes the kidneys, ureters, bladder, and urethra, all of which play crucial roles in maintaining body homeostasis by managing waste and excess substances in the bloodstream.