Tasnujjya d tussna yessegrawen tirmiyin n tilsanin i wsuji n wemdan d waṭṭanen d wuguren yettaɣen tafekka-ynes d yiman-is yakk d twennaṭ anda yettidir, Tasnujjya tettarem ad taf asuji s sin n imuren-is asafran d ufetkan s usexdem-nsen ɣef umaṭun. Akken i tzerrew (tasnujjya) tiwetlin yessebɣasen ɣef tnekra d tnelfiyt n waṭṭanen d tirrayin d iberdan n taggaẓt ɣef waṭṭanen-a.

Tasnujya d tussna yettwasensen yettɣellit seg tirmiyin id yellan seg teɣzi n umezruy.

Amezruy n tesnujjya ẓreg

 
Andreas Vesalius yettumeggez d bab n tezrawt n usemmili

Tasnujjya d tawuri tamzikt (taqburt) s temzekt n wemdan s timmad-is. Tazwara-ynes teqqen s imahilen n tisemtit d ukerrer deg talliyin timzikin sin akin tennefli cwiya s tnekra n tɣermawin am tɣerma n igersafen d tɣerma taferwant.

Isurrifen ussnanen isnajjyanen ẓreg

Timeẓriwin d tlisa n tesnujjya ẓreg

Tussniwin tigejdanin n tesnujjya ẓreg

Timuzzag tisnajjyanin ẓreg

Ẓeṛ daɣen ẓreg