this might be due to leakage of the indoor air as the large number of students use these doors to enter and to leave the dissection room during the dissection session. This shows importance of the local ventilation in the dissection rooms as many of the medical schools have their gross anatomy dissection rooms in the basements, which should be discouraged.
The mean indoor FA concentration was lowest during the 4th week when region of the arm was being dissected and it was the highest in the 10th week (Table 1, Figure 2) during the abdominal cavity dissection.