11.it is been shaped paired organs which are about 5 to 5 inches long and 2 to 3 inches wide.a.kidney b.heart c.lungs d.brain
12. which is not the function of kidney
a.remove urea from blood through filtering units called nephron.
b.keep stable balance of salts and other substances in the blood
c.produce hormone that aids the formation of blood cell
d.create new cell in our body.​