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  • 1
    Electronic Resource
    Electronic Resource
    The membrane systems of the cardiac muscle cell of Tmetonyx cicada O. Fabricius (Crustacea, Amphipoda) (1976)
    Springer
    Cell & tissue research 173 (1976), S. 451-460 
    Details
    ISSN: 1432-0878
    Keywords: Cardiac sarcomeres ; Tmetonyx cicada (Crustacea) ; T-tubules ; Sarcoplasmic reticulum ; Couplings ; Electron microscopy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The membrane systems of the cardiac muscle cell of the amphipod Tmetonyx cicada (O. Fabricius) are described. The sarcolemma invaginates and forms a transverse network of tubules at the level of the Z band. Narrow longitudinal tubules branch from the network and connect to another transverse network of tubules at the H band level, where dyadic and triadic junctions are formed with the sarcoplasmic reticulum. Adjacent myofibrils are normally separated by a well developed double layer of the sarcoplasmic reticulum. In areas where the myofibrils closely approach the outer sarcolemma, peripheral couplings have been found at the level of the H band.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00224307
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  • 2
    Electronic Resource
    Electronic Resource
    The membrane systems of the cardiac muscle cell of Cirolana borealis Lilljeborg (Crustacea, Isopoda) (1975)
    Springer
    Cell & tissue research 163 (1975), S. 175-184 
    Details
    ISSN: 1432-0878
    Keywords: Cardiac sarcomeres ; Circolana borealis (Isopod) ; T-tubules ; Sarcoplasmic reticulum ; Couplings ; Electron microscopy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The membrane systems of the cardiac muscle cell of the isopod Cirolana borealis Lilljeborg are described. The sarcolemma invaginates at the level of the Z band, forming transverse tubules. Narrow tubules branch off in a longitudinal direction from these transverse and radially arranged TZ-tubules forming a transverse collar at each A-I level, where dyadic and triadic junctions are formed with the sarcoplasmic reticulum. Two different orientations of the coupling discs have been detected in the supercontracted sarcomere, and this observation has been discussed. Adjacent myofibrils are separated by a double layer of sarcoplasmic reticulum.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00221725
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  • 3
    Electronic Resource
    Electronic Resource
    The membrane systems of the cardiac muscle cell of Munida tenuimana G. O. Sars (Crustacea, Decapoda) (1975)
    Springer
    Cell & tissue research 159 (1975), S. 339-349 
    Details
    ISSN: 1432-0878
    Keywords: Cardiac sarcomere ; Munida tenuimana (crustacea) ; T tubule system ; Sarcoplasmic reticulum ; Couplings
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The membrane systems of the cardiac muscle cell of Munida tenuimana G. O. Sars are described. The sarcolemma invaginates at the Z level, forming tubules. Narrow tubules branch off in a longitudinal direction from these transverse and radially arranged tubules, forming a narrow transverse collar at the H level where dyadic and triadic junctions are formed with the sarcoplasmic reticulum.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00221781
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  • 4
    Electronic Resource
    Electronic Resource
    Ultrastructure of the heart of the sturgeon Acipenser stellatus (Chondrostei) (1979)
    Springer
    Cell & tissue research 202 (1979), S. 431-438 
    Details
    ISSN: 1432-0878
    Keywords: Sturgeon ; Heart ; Ultrastructure ; Sarcoplasmic reticulum ; Granules
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The ultrastructure of atrial and ventricular myocardial cells from Acipenser stellatus is described. The cells of the atrium are more loosely connected than those of the ventricle. Cell contact is by simple intercalated discs and by desmosomes. The cells are flattened, with peripheral myofibrils and a central region of mitochondria and the nucleus. The sarcoplasmic reticulum consists of subsarcolemmal tubules, that frequently extend towards the central mitochondria. Dyads are small and positioned at any sarcomeric level. No T-tubules are present. Specific granules are restricted to the atrial cell, and are sometimes present within the SR tubules.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00220435
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  • 5
    Electronic Resource
    Electronic Resource
    The membrane systems of the cardiac muscle cell of Meganychtiphanes norvegica (M. Sars), euphauciacea, crustacea (1977)
    Springer
    Cell & tissue research 181 (1977), S. 339-347 
    Details
    ISSN: 1432-0878
    Keywords: Cardiac sarcomere ; Meganychtiphanes norvegica ; T-tubule system ; Sarcoplasmic reticulum ; Couplings
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The membrane systems of cardiac muscle cells of the euphausiacean Meganychtiphanes norvegica are described. Transverse tubules are found both at the Z-band level (Tz-tubules) and at the H-band level (Th-tubules). Within the sarcomere narrow longitudinal tubules branch off from the Tz-tubules. At the H-band level these tubules expand forming flattened cisternae in dyadic and triadic couplings with the sarcoplasmic reticulum (SR). Adjacent myofibrils are separated by a well developed SR. Modifications of the SR are seen at the H-band level where junctional cisternae are formed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00223109
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