Excretory Products and Organs of Vertebrates

Excretory products are Co2, mineral salts, urea, creatinine, uric acid, bile pigments and excess water. Excretory organs are Kidneys, gills, skin, lungs and intestine.

allow you to overcome the fear of communication; – Expand vocabulary at the fastest pace, develop fluency;- improve understanding of the interlocutor’s expressions in a foreign language, since different people have different pronunciation; – are regular, pleasant, allow you to make new acquaintances and expand your social circle When are group classes not for you? Where to go to study?