Other dino specialists have likewise argued that long-necked sauropods were unlikely to have had a heart that was big enough to enable it to feed vertically for much of the time.

• 其他的恐龙专家也有类似的理由,认为长颈蜥脚类动物不大可能拥有一个足够大的心脏从而使它能够长时间地进行垂直进食。