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When a person is sick, it is evident that something is wrong in their system.
Symptoms such as headache, fever, cold, cough, rashes, and abnormal bowel
movements are not diseases, but rather indications that there is a problem in
the body. The human body cannot create illness on its own, so there must be
something from the outside that has entered. As the infection grows, it is clear
that a living organism is involved. The foreign body multiplies within the body,
producing toxic materials that eventually spread and cause harm.
Thanks to the work of pioneers like Louis Pasteur, it has been proven that
infectious diseases are caused by micro-organisms. The invention of powerful
microscopes has allowed us to learn about these organisms, and today, many of
them have been eradicated.
When a piece of zinc and copper is placed in dilute sulfuric acid or acidulated
water, it can be seen that an electric current flows. Bubbles of hydrogen can be
observed moving, and when the flow of hydrogen is stopped or blocked, there is
no current. This shows a relationship between the flow of current and the flow
of hydrogen particles, which are charged and carry power. When hydrogen
particles attack copper, charge is released, and the flow of electricity is
simply a flow of particles.
The nature of conductors like copper and other metals is also important to
understand. These elements have electrons moving in their outer orbits, and when
an extra charge of the same nature enters, there can be no chemical reaction,
and the extra charge overflows.
In conclusion, infectious diseases are caused by living organisms, and electric
currents are caused by the flow of particles. |
