Calf Muscles. 1  The calf muscles are six in number: the gastrocnemius, the soleus, the popliteus, the tibialis posterior, the flexor digitorum longus, and the flexor hallucis longus. 2  The gastrocnemius and the soleus run between the knee and the ankle. 3  One of the calf muscles, the soleus, has a special ability.
Ozone Pollution. Ground level or bad ozone is not emitted directly into the air, but is created by chemical reactions between oxides of nitrogen (NOx) and volatile organic compounds (VOC) in the presence of sunlight.
The recent record-breaking heat waves dramatically increased the levels of ozone, which can cause sunburn-like effects on our delicate lungs. Hereâs how smog affects the human body. A mixture of the small PM2.5 particles get directly into our bloodstream by sneaking through the tiniest air sacs called alveoli. Once in your blood stream, these air pollution particles act like cigarette smoke, triggering inflammation that makes cholesterol more sticky.