"On a practical level, information specifies the many parts needed to make machines work. Often, the removal of one part can disrupt the whole machine, so there is a minimum number of parts without which the machine will not work. Biochemist Michael Behe, in his book Darwin’s Black Box, calls this minimum number irreduciblecomplexity. He gives the example of a very simple machine: a mousetrap. This would not work without a platform, holding bar, spring, hammer, and catch, all in the right place. If you remove just one part, it won’t work at all—you cannot reduce its complexity without destroying its function entirely.
The thrust of Behe’s book is that many structures in living organisms show irreducible complexity, far in excess of a mousetrap or indeed any man-made machine.
For example, he shows that even the simplest form of vision in any living creature requires a dazzling array of chemicals in the right places, as well as a system to transmit and process the information. The blood-clotting mechanism also has many different chemicals working together, so we won’t bleed to death from minor cuts, nor yet suffer from clotting of the entire system."
CMI