She possan dy lossreeyn as cuishlinyn ligninagh ny lossreeyn feddanagh (lossreeyn cuishlagh, lossreeyn ooashley, tracheophyta ny tracheobionta). Ta ny cuishlinyn shoh (sylem as phloem) gymmyrkey ushtey, stoo meainagh as troar co-haaghey sollysh fud y lus.