tissual

The amplitude of respiratory movement increases (from 230 ml, actual volume at the age of 11, to 300 ml at 13), the respiratory frequency decreases (from 22 per minute at the age of 11, to 20 at the age of 13), the vital capacity increases and the tissual breathing--assessed according to maximum O2 intake per minute--increases considerably (yet the maximum limits of aerobic capacity to effort are not reached, thus in resistance efforts, maximum results cannot be obtained).

--antigen-binding lymphocytes (ABL) with different tissual antigens of the lungs--by a method of indirect rosette-formation;