title: On the presence of conspicuous electron dense bodies in the pinealocytes of the pig.
abstract: The pinealocytes of the pig contain a large number of aldehydefuchsin positive granules. In order to determine their nature an ultrastructural study was carried out. Numerous bodies having a maximal diameter of about 1,600 nm were found. These elements showed a great variety of internal structure, ranging from a "homogeneous" content and amorphous dense aggregates to lamellate bodies. Although only a few of them displayed a positive reaction for acid phosphatase, their morphological appearance strongly suggests that they belong to the lysosomal system.
mesh_terms: D000135:Acid Phosphatase / Q000378:metabolism; D000818:Animals; D005260:Female; D008247:Lysosomes / Q000648:ultrastructure*; D008297:Male; D009940:Organoids / Q000648:ultrastructure; D010870:Pineal Gland / Q000201:enzymology / Q000648:ultrastructure*; D013552:Swine / Q000033:anatomy & histology*
chemical_list: D000135:Acid Phosphatase