On the Fine Structure of Lymph Hearts in Amphibia and Reptiles

Satoh, Yoh-ichi; Nitatori, Tohru

doi:10.1016/b978-0-12-119401-7.50011-6

Cited by 9 publications

(20 citation statements)

References 22 publications

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“…This fact might obscure the importance of the corpuscular afferent nerves on the lymph heart function. However, the presence of a relatively large number of unmyelinated nerve fibers in the amphibian lymph heart wall (SATOH and NITATORI, 1980) might indicate that at least some afferent nerve regulations are present in amphibian lymph hearts.…”

Section: Discussionmentioning

confidence: 99%

“…Recently, SATOH and NITATORI (1980) found in the tunica externa of the Pseudemys lymph heart the occurrence of Meissner-like corpuscles which corresponded in structure to the "simple small corpuscle" of ITO (1944). The three-dimensional reconstruction of their fine structure performed in this study revealed 1) the arborizations and varicositylike dilatations of axon terminals within the corpuscle, 2) densely packed lamellae which surrounded the axon terminals without intervening basal lamina or collagen fibrils, 3) relatively few caveolae on the lamellae and 4) an incomplete capsule of thin cellular processes.…”

Section: Discussionmentioning

confidence: 99%

“…ITo (1944) observed Meissner-like corpuscles on the wall of the lymph heart of turtles and snakes by means of a silver impregnation method. SATOH and NITATORI (1980) observed corpuscular nerve endings consisting of axon terminals intimately surrounded by multiple-stacked lamellae in the tunica externa of the turtle lymph heart. These lamellated corpuscles were thought to represent pressoreceptors in the lymph heart.…”

mentioning

confidence: 99%

“…This occurs in many classes of vertebrates, except mammalia. There have been many light (see review by KAMPMEIER, 1969) and electron microscopic studies (KAWAGUTI, 1967;RUMYANTSEV and SHMANTZAR, 1967;SCHIPP and FLINDT, 1968;LINDNER and SCHAUMBURG, 1968;SATOH and NITATORI, 1980) on the structure and on the development of the lymph heart.…”

mentioning

confidence: 99%

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Ultrastructure of the corpuscular nerve ending in the lymph heart of the turtle (Pseudemys scripta elegans).

Satoh

Nitatori

1983

Arch. Histol. Jap., Arch. Histol. Jpn

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

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Ultrastructure of the corpuscular nerve ending in the lymph heart of the turtle (Pseudemys scripta elegans).

Satoh

Nitatori

1983

Arch. Histol. Jap., Arch. Histol. Jpn

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“…Morphological characteristics of developed lymph heart muscle fibres such as the appearance of satellite-type cells and endplate-like neuromuscular junctions as well as the absence of disci intercalares, complete the image of a modified type of skeletal muscle (Schipp and Flindt 1968;Satoh and Nitatori 1980;Markozashvili and Rumyantsev 1984a). Its structural specializations, diverging from skeletal muscle differentiation such as the branching of myofibrils and accumulations of dense-cored vesicles, can be correlated with the functional peculiarities of this organ.…”

Section: Appearance Of Contractile Myofibres and Valve Differentiatiomentioning

confidence: 99%

Early development and myogenesis of the posterior anuran lymph hearts

Greber¹,

Schipp²

1990

Anat Embryol

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The early development of anuran posterior lymph hearts studied by light- and electron-microscopy in frog larval stages 25-29 (Gosner 1960) can be subdivided into three phases. In phase I, mesenchymal myogenic cells are found, each possessing a single 9 + 0 cilium and numerous filopode-like processes aggregated near the vena caudalis lateralis, forming up to three metameric organ anlagen arranged like a cuff around the preexisting lymphatics (stages 26/27). In phase II, cell proliferation starts at stage 28 within the lymph heart wall as does the formation of primarily polynuclear myofibres by fusion of several myoblasts. At this stage immature myofibres show a vast sarcoplasm, a poorly developed SR and only few myofibrils with not yet distinguishable A- and I-bands. In phase III, the afferent and efferent valves are formed at the onset of pulsation in stage 29. Contractile myofibres contain large glycogen fields and a considerable amount of myofibrils which frequently branch and show distinct Z-lines, A-, I-, H- and M-bands; 1-3 cilia were found lying within a channel-like cell invagination. The peculiarities of organogenesis and myofibre development are discussed.

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An early post‐traumatic reaction of lymph‐heart striated muscle fibers in adult frog Rana temporaria during the first postoperative week: An electron microscopic and autoradiographic study

Krylova

Bogolyubov

2015

Journal of Morphology

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According to the current opinion, lymph-heart striated muscle represents a specialized type of skeletal muscles in frogs. Here, we studied muscle fibers in mechanically damaged lymph hearts during the first postoperative week using electron-microscopic autoradiography. We present evidence that both, the satellite cells and pre-existing muscle fibers bordering the site of injury, contribute directly to the lymph-heart muscle regeneration. Several muscle fibers located in the vicinity of the damaged area displayed features of nuclear and sarcoplasmic activation. We also observed ultrastructural changes indicating activation of a few satellite cells, namely decondensation of chromatin, enlargement of nuclei and nucleoli, appearance of free ribosomes and rough endoplasmic reticulum tubules in the cytoplasm. Electron-microscopic autoradiography showed that 4 h after single (3)H-thymidine administration on the seventh day after injury not only the activated satellite cells, but also some nuclei of myofibers bordering the injured zone are labeled. We showed that both, the myonuclei of fibers displaying the signs of degenerative/reparative processes in the sarcoplasm and the myonuclei of the fibers enriched with highly organized myofibrils, can re-enter into the S-phase. Our results indicate that the nuclei of lymph-heart myofibers can reactivate DNA synthesis during regenerative myogenesis, unlike the situation in regenerating frog skeletal muscle where myogenic cells do not synthesize DNA at the onset of myofibrillogenesis.

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On the Fine Structure of Lymph Hearts in Amphibia and Reptiles

Cited by 9 publications

References 22 publications

Ultrastructure of the corpuscular nerve ending in the lymph heart of the turtle (Pseudemys scripta elegans).

Ultrastructure of the corpuscular nerve ending in the lymph heart of the turtle (Pseudemys scripta elegans).

Early development and myogenesis of the posterior anuran lymph hearts

An early post‐traumatic reaction of lymph‐heart striated muscle fibers in adult frog Rana temporaria during the first postoperative week: An electron microscopic and autoradiographic study

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