And finally come the leaves that represent the alveoli which are the microscopic structures of the lungs responsible for allowing oxygen to get into the bloodstream.
(the leaves; represent; the alveoli which are the microscopic structures of the lungs responsible for allowing oxygen to get into the bloodstream) (the alveoli; are; the microscopic structures of the lungs responsible for allowing oxygen to get into the bloodstream)
the leaves the alveoli
represent are
the alveoli which are the microscopic structures of the lungs responsible for allowing oxygen to get into the bloodstream
the microscopic structures of the lungs responsible for allowing oxygen to get into the bloodstream