Organski sistemi
Viri: https://www.ringaraja.net/clanek/razgibajmo-crevesje_5343.html https://vizita.si/bolezni/kako-dobro-poznate-mozgane.html https://www.mladinska-knjiga.si/dobrezgodbe/zdravo-zivljenje/spoznaj-srce https://www.innerbody.com/anatomy/respiratory/lungs https://vodmatnaravoslovje4.blogspot.com/p/blog-page.html https://www.mozaweb.com/sl/Extra-3D_animacije-Ravni_bioloske_organizacije-216810
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