Complex sentence: The HD comprises two rivet-like plaques (the inner and outer plaques), together with the anchoring fibrils and anchoring filaments these are collectively termed the HD-stable adhesion complex or HD-anchoring filament complex.
Split into simpler sentences: The HD comprises two rivet-like plaques (the inner and outer plaques). Together with the anchoring fibrils and anchoring filaments, these are collectively termed the HD-stable adhesion complex or HD-anchoring filament complex.