title: Embryonic development of the pineal gland of the chicken (Gallus gallus).
abstract: A study of the embryonic development of the pineal gland of the chicken was performed with the optical microscope. The time of apparition of the first outline, as a derivative of the roof of the third ventricle, was fixed at 3 days. The major portion of the pineal parenchyma is derived from the frontal wall of the outline. All the vesicles and follicles were formed by solid mammilliform projections which subsequently presented a central lumen. In no case was a communication of the follicular cavities with the pineal recess observed. Three categories of vesicles or follicles can be distinguished according to their origin.
mesh_terms: D000818:Animals; D002196:Capillaries / Q000166:cytology; D002454:Cell Differentiation; D002467:Cell Nucleus; D002642:Chick Embryo; D003593:Cytoplasm; D004847:Epithelial Cells; D010870:Pineal Gland / Q000098:blood supply / Q000166:cytology / Q000196:embryology*