الفهرس 
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Abstract
The respiratory system is one of the complicated systems in the human
body. The analysis of the respiratory process is vital for studying,
evaluating the respiratory system, and diagnosing its diseases. Modeling
is important for analysing, evaluating, predicting, diagnosing, and
studying the behavior of the human body systems.
In this research, the mathematical model for the respiratory system was
proposed based on the electro-acoustic bio-impedance analysis with a
huge number of equations to solve this system. Further, the behaviour of
each generation from the 24 generations of the respiratory system can be
analysed separately. Furthermore, the pressure with the ventilated
frequency range 1-1200 min-1
can be calculated at any generation. The
proposed mathematical model is validated by comparing the results with
the published results.
The results of the simulations for normal, ARDS, pneumonia, asthma,
COPD, and asthma COPD overlapped syndrome (ACOS) cases are
presented.
The proposed mathematical model with a huge number of equations is
implemented by the Matlab program package. This proposed
mathematical model and the simulation can be used as a reversed problem
solution to detect and diagnose the medical situation of the respiratory
system for the patients, such as those who are associated with ARDS,
pneumonia, asthma, COPD, ACOS, and recently COVID-19.
Keywords - Respiratory system and its diseases, modeling and
simulation, mechanical ventilation, bio-impedance, and electro-acoustic
analogy