Summary
Atrial and ventricular muscle in the pike and mackerel hearts consists of narrow, branching cells. The atrial cells in the two species are similar whereas the ventricular cells differ. The sarcolemma is attached to the Z and M lines of the sarcomere. Intercalated discs are common, and the transverse parts display desmosomes and intermediate junctions. Nexuses are uncommon and only occur in the longitudinal parts of the intercalated discs. The sarcoplasmic reticulum forms a regular hexagonal network on the myofibrillar surface. Subsarcolemmal cisternae form peripheral couplings at the I-A level. Junctional processes are usually inconspicuous, but an electron dense substance is present between the sarcolemma and the Junctional sarcoplasmic reticulum. Specific heart granules are common in atrial cells of both species and in ventricular cells of the pike, but are very scarce in mackerel ventricular muscle.
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References
Alexander RMcN (1967) Functional design in fishes. Hutchinson & Co, London
Anderson PAW, Mauring A, Sommer JR, Johnson EA (1976) Cardiac muscle: An attempt to relate structure to function. J Mol Cell Cardiol 8:123–143
Berge PI (1979) The cardiac ultrastructure of Chimaera monstrosa L. (Elasmobranchii: Holocephali). Cell Tissue Res 201:181–195
Bloom GD (1962) The fine structure of cyclostome cardiac muscle cells. Z Zellforsch Mikrosk Anat 57:213–239
Cantin M, Benchimol S, Castonguay Y, Berlinguet J-C, Huet M (1975) Ultrastructural cytochemistry of atrial muscle cells. V. Characterization of specific granules in the human left atrium. J Ultrastruct Res 52:179–192
Forssmann WG, Girardier L (1966) Untersuchungen zur Ultrastruktur des Rattenherzmuskels mit besonderer Berücksichtigung des sarkoplasmatischen Retikulums. Z Zellforsch Mikrosk Anat 72:249–275
Helle KB, Lønning S (1973) Sarcoplasmic reticulum in the portal vein heart and ventricle of the cyclostome Myxine glutinosa (L.) J Molec Cell Cardiol 5:433–439
Helle KB, Storesund A (1975) Ultrastructural evidence for a direct connection between the myocardial granules and the sarcoplasmic reticulum in the cardiac ventricle of Myxine glutinosa (L.). Cell Tissue Res 163:353–363
Humason GL (1972) Animal tissue techniques. 3rd ed. Freeman and Co, San Francisco
Jewitt PH, Sommer JR, Johnson EA (1971) Cardiac muscle. Its structure in the finch and hummingbird with special reference to the sarcoplasmic reticulum. J Cell Biol 49:50–65
Kilarski W (1964a) The organization of the cardiac muscle cell of the lamprey (Petromyzon marinus L.). Acta Biol Cracov VII: 75–95
Kilarski W (1964b) Observations on the myocardium of the cardiac chamber of the sand-eel (Ammodytes tobianus L.). Acta Biol Cracov VII: 235–245
Kilarski W (1967) The fine structure of striated muscle in teleosts. Z Zellforsch Mikrosk Anat 79:562–580
Leknes IL (1980) Ultrastructure of atrial endocardium and myocardium in three species of Gadidae (Teleostei). Cell Tissue Res 210:1–10
Lemanski LF, Fitts EP, Marx BS (1975) Fine structure of the heart in the Japanese medaka, Oryzias latipes. J Ultrastruct Res 53:37–65
Mercer EM, Birbeck MSC (1972) Electron microscopy. A handbook for biologists. 3rd ed. Blackwell scientific Publications, Oxford
Myklebust R, Kryvi H (1979) Ultrastructure of the heart of the sturgeon Acipenser stellatus (Chondrostei). Cell Tissue Res 202:431–438
Santer RM (1974) The organization of the sarcoplasmic reticulum in teleost ventricular myocardial cells. Cell Tissue Res 151:395–402
Santer RM, Cobb JLS (1972) The fine structure of the heart of the teleost, Pleuronectes platessa L. Z Zellforsch Mikrosk Anat 131:1–14
Santer RM, Walker MG (1980) Morphological studies on the ventricle of teleost and elasmobranch hearts. J Zool, Lond 190:259–272
Seiden D (1979) Specific granules of the rat atrial muscle cell. Anat Rec 194:587–602
Shibata Y, Yamamoto T (1976) Fine structure and cytochemistry of specific granules in the lamprey atrium. Cell Tissue Res 172:487–501
Simpson FO, Rayns DG, Ledingham JM (1973) The ultrastructure of ventricular and atrial myocardium. In: Challice CE, Viragh S (eds) Ultrastructure of the mammalian heart. Academic Press, New York, pp. 1–41
Sommer JR, Johnson EA (1969) Cardiac muscle. A comparative ultrastructural study with special reference to frog and chicken hearts. Z Zellforsch Mikrosk Anal 98:437–468
Sommer JR, Johnson EA (1979) ultrastructure of cardiac muscle. In: Berne RM (ed) Handbook of physiology, section 2: The cardiovascular system, vol 1. The heart. American Physiological Society, Bethesda, pp 113–186
Sætersdal TS, Justesen NP, Krohnslad AaW (1974) Ultrastructure and innervation of the teleostean atrium. J Mol Cell Cardiol 6:415–437
Theron JJ, Biagio R, Meyer AC, Boekkooi S (1978) Ultrastructural observations on the maturation and secretion of granules in atrial myocardium. J Mol Cell Cardiol 10:567–572
Tota B (1978) Functional cardiac morphology and biochemistry in Atlantic bluefin tuna. In: Sharp GD, Dizon AE (eds) The physiological ecology of tunas. Academic Press, New York, pp 89–112
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This work was supported by grants from the Norwegian Research Council for Sciences and the Humanities
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Midttun, B. Ultrastructure of atrial and ventricular myocardium in the pike Esox lucius L. and mackerel Scomber scombrus L. (Pisces). Cell Tissue Res. 211, 41–50 (1980). https://doi.org/10.1007/BF00233721
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DOI: https://doi.org/10.1007/BF00233721