an exchange of gases between alveoli of lungs and capillaries of the pulmonary circulation is defined as

explanation:

okay now i don't know this but for the pints nothing else to say bye

the main thing i would use is bricks because if there is a hurricane, there is a great possibility for the house to still stand. and i would also use plexiglass windows instead of regular windows because plexiglass isn't prone to breaking.

answer; cnidarians;