The processes and terminal bulbs in the pineal gland of mammals.
D000818:Animals; D002415:Cats; D004847:Epithelial Cells; D004848:Epithelium / Q000648:ultrastructure*; D006654:Histology, Comparative; D008322:Mammals / Q000033:anatomy & histology*; D010870:Pineal Gland / Q000033:anatomy & histology / Q000648:ultrastructure*; D051381:Rats