lungs necklace | silver pp_protein Often given as a small

Often given as a small marker for someone who watches the sky on purpose

and nuclear physicists

The silver version is the working astronomer's piece

cell-body summation

It identifies the field without requiring any explanation

lungs necklace | silver pp_protein Often given as a smallLungs necklace sterling silver The lungs are air exchange machines built for efficiency. About 480 million alveoli in each pair, with a surface area of roughly 70 square metres. Oxygen in, carbon dioxide out. A 21 mm sterling silver pendant centred at the chest. The Science Behind the Lungs Adult human lungs have a total volume of approximately 3 litres and contain roughly 480 million alveoli for gas exchange. The bronchial tree branches from the