What substances does the body release into the external environment?

With the help of the kidneys, we get rid of the end products of metabolism, water. The salivary and gastric glands secrete excess calcium, bile acids, bilirubin, some drugs (quinine, morphine), as well as foreign organic compounds (dyes) and heavy metal salts. First of all, carbon dioxide, vapors of alcohol, ether, acetone, etc. are excreted through the lungs. The skin through the sweat glands excretes water from the body with salts of sodium, potassium, calcium, urea, and through the sebaceous – sebum.