Want to know what scientists are referring to when they talk about the complexity of living things? Go here.
You can click on any region of the map, and it'll give you a blow-up of that region.
A word of caution: You must keep in mind that all of this amazing intricacy, organization, and plain genius just looks designed, but the appearance of design is an illusion. All intelligent people know that blind chance and chemistry are responsible for having built these pathways serendipitously from scratch. It happens all the time.
Keep telling yourself that as you look at it, because if you don't you're likely to find yourself wondering if those nefarious intelligent design people, who foolishly think this sort of thing is evidence of the creative activity of an intelligent agency, aren't on to something.