Submicroscopic Structure of the Carp Erythrocyte as Revealed by Electron Microscopy

1. The submicroscopic structure of the carp erythrocyte has been studied on ultrathin sections. The material was fixed in buffered (pH 7.4) osmium tetroxide solution and embedded in n-butyl methacrylate. 2. The osmiophilic body in the cytoplasm seems to be the Golgi apparatus which is connected with the nucleus and cell membrane through the tubule. 3. The nucleus surface is characterized by drumstick-like processes protruding into the cytoplasm. 4. The nuclear membranes are observed as double layers, a porous external one and a compact internal one. 5. The heterochromatin appears as dense bodies attached to the coiled euchromatic threads. 6. The metabolic chromosome in the carp erythrocyte nucleus is composed of coiled filaments with a pitch of 20-40mμ and a width of 10-20mμ.