偽血系
Pseudhaemal \Pseud*h[ae]"mal\, a. [Pseudo- + h[ae]mal.]
(Zo["o]l.)
Pertaining to the vascular system of annelids.
{Pseudh[ae]mal fluid}, the circulatory fluid, or blood, of
annelids, analogous to the blood of vertebrates. It is
often red, but is sometimes green or colorless.
{Pseudh[ae]mal vessels}, the blood vessels of annelids.