Board Thread:Off Topic/@comment-25396609-20160502222905/@comment-24534644-20160515021721

To answer your question, Blu3, technically it's not confirmed. For most of the series, we've never seen them leak any fluids upon having their limbs or heads severed, which may or may not just be animation limitations/laziness.

Although this brief scene may imply that they do. Keyword: MAY.