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> Looking at the big picture, the researchers think the whale’s heart is performing near its limits. This may help explain why no animal has ever been larger th
by arunc 7mo ago
> Looking at the big picture, the researchers think the whale’s heart is performing near its limits. This may help explain why no animal has ever been larger than a blue whale – because the energy needs of a larger body would outpace what the heart can sustain.
Fascinating to learn such details!
- mr_mitm 7mo agoCould an animal have several hearts?
- djtriptych 7mo agoyes. I know octopuses and squids have three hearts. Just looked it up and it seems no mammal has more than one heart.
- joecool1029 7mo agoI do wonder if those animals have things like valves in their veins, as I understand it if the circulatory system wasn't as complex as it is, heart would have to pump a lot harder to move the volume it does. This isn't an area I know much of anything about, I just know veins have valves and can expand and contract to different stimuli much as a heart can... so even though mammals have one heart it's not like the rest of the system is a static not helping to pump blood.