@brynthefish: Replying to @CiCi 🩻 Fish hearts are a little different than ours with only one atrium and one ventricle but a few extra bits that make up the single loop system bringing oxygenated blood from the gills to the body and back again (humans have a more complex 4 chambered system that separates oxygenated blood and deoxygenated) #Science #fishtok #fish #anatomy

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Monday 02 February 2026 22:02:07 GMT