heh i dn't think there is a very complex web image out there...you get very simple ones in high school text but after gr.10,11 science the fields begin to separate and i don't think any textbook past that would illustrate what you desired...I myself have been looking for one...and decided to draw it on my own i've started wth math and psych.
NOTE in my desire to design such a web, i've come to the conclusion that you can't do it in 2D with it looking very ugly. As i have done with my math and psych one.
technically tribdog's example is wrong...it begins with math(counting) and the concept of single,entity,object otherwise known as one "1" from 1 you'd draw 2 branches  fundamental "solid"(not the solid definition in high school)... leads to math(set/number/fx theory) which branches off to many like REAL number system(calculus), more set theory, language theory, computability etc.
back to the first branch ...if you believe there exists "fundamental incompressible solid" it leads to what we have in fields/particles...then to atoms...molecules(chemistry)...compounds...larger compounds
each also has branches for characteristics/interactions/forces etc.
"larger compounds" leads to inorganic(plastics,drugs more chemistry), organic-biomolecules(amino acids,mmm the other little worm like structures that hold the cell wall together and create gates...for the biomolecules leads to cells DNA,genes,Organisms..and the entire bio tree as one could look up in the bio text.
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