title: Ultrastructure of elasmobranch lymphoid tissue. 2. Leydig's and epigonal organs.
mesh_terms: D000818:Animals; D002467:Cell Nucleus / Q000648:ultrastructure; D002843:Chromatin / Q000648:ultrastructure; D003594:Cytoplasmic Granules / Q000648:ultrastructure; D004721:Endoplasmic Reticulum / Q000648:ultrastructure; D005399:Fishes; D006066:Gonads / Q000648:ultrastructure*; D007985:Leydig Cells / Q000648:ultrastructure*; D008221:Lymphoid Tissue / Q000648:ultrastructure*; D008297:Male
chemical_list: D002843:Chromatin