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an allergic reaction that triggers the immune system causing constriction and inflammation of the respiratory tract resulting in wheezing and breathing difficulties.
the spontaneous movement of molecules, atoms or ions, from an area of higher concentration to an...
disease caused when the arteries that supply the heart muscle become narrowed or blocked by the...
an atom or a group of atoms that has gained or lost one or more electrons and so has an electric...
is one-millionth of a metre or one-thousandth of a millimetre (0,001 mm). Its unit symbol in the...
a sudden severe instance of abnormal heart function accompanied by chest pains and possible...