Final answer:
Wastes are transported to the kidneys through blood vessels as part of the urinary system, where they are filtered by nephrons and excreted as urine. Correct option is (A).
Step-by-step explanation:
Wastes are carried to the kidney for removal through blood vessels. This process is part of the urinary system, which includes the kidneys, ureters, urinary bladder, and urethra. The kidneys have an essential role in filtering waste products and excess water from the blood, which is facilitated by numerous nephrons within the kidneys.
These nephrons are the functional units that carry out the filtration of blood, leading to the formation of urine that contains urea—a waste product resulting from the breakdown of proteins—and other waste materials. Eventually, urine is excreted from the body through the urinary system, maintaining the balance of fluids and electrolytes, as well as removing toxins.
Cellular wastes are moved by the blood to the kidneys where they are removed from the blood to form urine. The urinary system includes the pair of kidneys, which filter excess water and a waste product called urea from the blood and form urine. The kidneys remove urea and other wastes from the blood through filtering units called nephrons.