Petra would most likely be experiencing a panic attack when he/she experiences <span>a racing heart and an intense fear that something horrible is about to happen. One of the main reasons why an individual experience a panic attack is that he/she most likely experiences a traumatic experience.</span>
<span>The effects of tobacco smoke on the respiratory system are irritation of the trachea (windpipe) and larynx (voice box) reduced lung function and breathlessness due to swelling and narrowing of the lung airways and excess mucus in the lung passages permanent damage to the air sacs of the lungs.</span>
The great saphenous vein (or GSV).
