has part has part has_part characteristic of part of has modifier abnormal neuroendocrine gland morphology abnormal circumventricular organ morphology abnormal secretory circumventricular organ morphology MP:0013563 any structural abnormality of any of the circumventricular organs that are responsible for secreting hormones and glycoproteins into the peripheral vascular system using feedback from both the brain environment and external stimuli abnormal secretory CVO morphology morphology abnormal secretory circumventricular organ