Answer:
The degradation of lung tissue does not allow enough oxygen which is required by the organisms for respiration and also less carbondioxode is removed from the body which caused damage to the organisms because carbondioxode is waste material that is produced during respiration of the cell. Suffocation occurs when the lung provides limited oxygen to the body.
Blood cells are produced in the bone marrow and the bone marrow is part of the skeletal system. So the answer would be skeletal system<em>. </em>