Označeno: obtočila

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Utrjevanje in preverjanje – obtočila

Viri: Slika srca: https://encrypted-tbn3.gstatic.com/images?q=tbn:ANd9GcSftmEecPQtAIZdG7h3l6VXcRTmRhVrNf2ae4ImoehP3yiCEild-w http://www2.arnes.si/~osljts3/NALOGE/BIOLOGIJA/index.htm https://slideplayer.si/slide/17538103/

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Srce/Čargo

Viri: https://www.freepik.com/free-photo/human-heart-design_870333.htm#page=1&query=human%20heart&position=2