BIOLOGY GCSE Biology – Gas Exchange and Lungs #16 Posted on 12/01/202012/01/2020 by apho2018 01 Dec Learn how the lungs and alveoli are adapted to carry out gas exchange. apho2018 NDA-1 2021 Foundation Batch || Chemistry || By Sameer Sir || 37 || Acid, Base And Salt Part -6 DOE Class-6 MATHS Worksheet-19 Date_01/12/2020 Subtraction of Fraction