this post was submitted on 18 Oct 2023
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I dunno. Reverse peristalsis can be pretty quick and result in a pretty steady flow. I'd imagine they'd have to adapt to develop that regardless of how they're going to expel things, similar how giraffes are able to chew their cud despite their long damn necks. Wouldn't be projectile vomiting as we describe it though. In the end their entire neck is a pump.
Good point. However, the height difference between giraffes and Brachiosaurus is still quite significant. I am not well versed enough in the exact mechanics of this but maybe it won’t scale well. Additionally, the neck of Brachiosaurus was probably far more flexible than that of a giraffe due to the higher number of vertebrae so they may be able to lower their necks more easily which reduces the pressure to evolve powerful pumping mechanisms.