Vascular spaces of the middorsal dura mater.
D001808:Blood Vessels / Q000033:anatomy & histology* / Q000196:embryology; D004388:Dura Mater / Q000033:anatomy & histology / Q000098:blood supply* / Q000196:embryology; D006801:Humans; D008833:Microcirculation / Q000033:anatomy & histology / Q000196:embryology