a decreased secretion of adrenaline and a decrease of vigilance.
Smoking produces carbon monoxide which is inhaled. As the haemoglobin in the red blood cells has a much greater affinity to this carbon monoxide than to oxygen it reduces the availability of haemoglobin to transport oxygen => which may lead to Anaemic hypoxia. Furthermore, chemicals in cigarette smoke cause the cells that line blood vessels to become swollen and inflamed. This can narrow the blood vessels and can lead to many cardiovascular conditions.
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