Question: this is the clear conclusion from the in vitro experiments and is supported by the observations that have been made in the animal experiments.
Answer: --> This is the clear conclusion from the in vitro experiments and is supported by the observations that have been made in the animal experiments.

Question: the decision as to which ventilation hood and duct system to use ultimately is based on a number of factors, especially the conditions locally, and should be made with knowledge of all the factors in consultation with a professional.
Answer: --> The decision as to which ventilation hood and duct system to use ultimately is based on a number of factors, especially the conditions locally, and should be made with knowledge of all the factors in consultation with a professional.

Question: normal lungs have fluid that is moved from the lungs into the internal space of the body, an on-going process for normal healthy function.
Answer:
--> Normal lungs have fluid that is moved from the lungs into the internal space of the body, an on-going process for normal healthy function.