AP BIOLOGY

Detailed explanation-1: -The urinary system includes the kidneys, ureters, bladder and urethra. This system filters your blood, removing waste and excess water. This waste becomes urine.

Detailed explanation-2: -After the body has taken the food components that it needs, waste products are left behind in the bowel and in the blood. The kidney and urinary systems help the body to eliminate liquid waste called urea, and to keep chemicals, such as potassium and sodium, and water in balance.

Detailed explanation-3: -The primary route in which the body eliminates substances is through the kidneys. The main function of the kidney is the excretion of body wastes and harmful chemicals into the urine. The functional unit of the kidney responsible for excretion is the nephron.

Detailed explanation-4: -The urinary system is also called the excretory system, because held within the urine are the various excreted products, including by-products such as urea and uric acid, drugs, excess body fluid and excess salts (electrolytes).