Concept map or knowledge structure for a tangled topic

Core organizing concept identified: everything in your list of facts about the immune system actually organizes around the distinction between innate and adaptive immunity, most of your listed terms are really sub-types or mechanisms within one of those two branches. Structure built explicitly: 'antibodies' relate to the core concept as 'a tool produced BY adaptive immunity,' not a separate third category as your original list implied by listing it alongside the two main branches. Foundational vs downstream: the innate/adaptive distinction itself is foundational, everything else (specific cell types, antibody mechanisms) is downstream and will click faster once that distinction is solid. Gap identified: your list uses the term 'memory cells' functionally but never names 'immunological memory' as its own distinct concept, worth learning explicitly since it explains why vaccines work, a concept implied but not stated in your list. Suggested learning order: innate vs adaptive distinction first, then specific innate mechanisms, then adaptive mechanisms, then immunological memory last, since it depends on understanding adaptive immunity first.