Die Entwicklung des Vorderdarmes, insbesondere des Magens der Wiederkäuer

Pernkopf, Eduard

doi:10.1007/bf02204757

Cited by 21 publications

(15 citation statements)

References 19 publications

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“…The gelatinous mass ventral to the stomach that we observed in specimens E8 to F26 was first described by Pernkopf (). He called it a subserous tissue cushion.…”

Section: Discussionsupporting

confidence: 69%

“…While the vast majority of studies on the embryonic development of the bovine stomach have relied on drawings from sections or plate models (Grote, ; Karl, ; Krüger, ; Lambert, ; Martin, , , ; Pernkopf, ; Schummer, ; Spamer, ; Stoss, , , ; Wölfel, ; Zimmerl, ), the present study relies on photographic documentation. Reflected light microscopy with an extended focus option turned out to be an invaluable tool.…”

Section: Discussionmentioning

confidence: 99%

“…Early studies on the development of the ruminant stomach were conducted as early as approximately 1900 with the methods available at that time, such as dissection with a loupe (Krüger, 1929), serial sections (Grote, 1896;Krazowski, 1880;Martin, 1889Martin, , 1891Spamer, 1907;Stoss, 1890;Warner, 1958) and plate models derived from serial sections (Karl, 1914;Lambert, 1948;Martin, 1894bMartin, , 1896Pernkopf, 1931;Schummer, 1932;Stoss, 1893Stoss, , 1894Wölfel, 1907;Zimmerl, 1900). The results were documented as drawings, and after 1930, photographs were used occasionally (Lambert, 1948;Pernkopf, 1931;Warner, 1958). These studies provided preliminary insight into the morphogenesis and histogenesis of the stomach of domestic ruminants but also resulted in strong debate.…”

Section: Introductionmentioning

confidence: 99%

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The embryonic development of the bovine stomach revisited

Kalenberg

Stoffel

2019

Anat Histol Embryol

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The adult anatomy and physiology of the bovine (Bos taurus) stomach have been investigated extensively. Despite the many studies, however, the early development of the stomach has not yet been fully elucidated. The goal of the present study, therefore, was to review the available literature, to visualize the embryonic and early foetal development of the bovine stomach and to shed light on unresolved issues. The stomachs of fifteen bovine embryos and eleven foetuses from 26 to 80 days of gestation were photographed both in situ and after exenteration and critical point drying. A series of photographs was obtained that yielded a contiguous and comprehensive view of all the developmental changes that occurred until the virtually final configuration of the stomach was attained. In addition, the serosal surface was studied by electron microscopy, thus revealing subtle regional differences in the lining of the peritoneal cavity. Our observations corroborate the contention that all the compartments evolve from the fusiform primordium and that no outgrowth at the level of the oesophagus occurs. The greater curvature as well as the attachment line of the dorsal mesogastrium shift to the left, which is similar to the process in monogastrians. The rumen and reticulum develop from separate protrusions, and further compartmentalization results from constrictions and bulges and not from folding. Between 55 and 60 days of gestation, the entire bovine stomach except for the abomasum eventually relocates to its final position. In summary, previously debated key issues were addressed and integrated with current findings.

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“…The gelatinous mass ventral to the stomach that we observed in specimens E8 to F26 was first described by Pernkopf (). He called it a subserous tissue cushion.…”

Section: Discussionsupporting

confidence: 69%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

The embryonic development of the bovine stomach revisited

Kalenberg

Stoffel

2019

Anat Histol Embryol

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“…To create a reasonable code for the stomach, the organ had to be subdivided by the`mesenterial plane' (Fig. 5).`With the help of the lines of ®xation of the dorsal and ventral mesogastrium to the stomach the ontogenetic right side could be clearly separated from the left side of the organ (Pernkopf 1931;Langer 1973Langer , 1988. This was possible because of the ontogenetic development of the stomach in relation to the two mesenteria.…”

Section: Methodsmentioning

confidence: 99%

“…The oesophageal pouch in the Cetacea with the exception of the Ziphiidae, lies orad 4 of the stomach (1 in character`14'). The oesophageal pouch lacks the third muscular layer of the oblique ®bres that can be found in the fornix and corpus ventriculi of other mammals (Pernkopf 1931(Pernkopf , 1937Langer 1988). In the Ziphiidae the oesophagus does not form such a pouch; it opens directly into a dilated section of the stomach, which is completely glandular in this mammalian family.…”

Section: Langermentioning

confidence: 99%

Evidence from the digestive tract on phylogenetic relationships in ungulates and whales

Langer

2001

J Zoological System

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Following consideration of 20 morphological parameters of the gastrointestinal tract of ungulates and Cetacea, as well as of the production of methane, phylogenetic trees were constructed for baleen whales (Mysticeti), toothed whales (Odontoceti) and beaked whales (Ziphiidae), as well as for four taxa of the PSHM group (Fischer and Tassy: in Szalay, F. S.; Novacek, M. J.; McKenna, M. C. (eds), Mammal Phylogeny, Placentals. New York, Berlin: Springer Verlag, pp. 217–234, 1993), the Proboscidea (elephants), Sirenia (sea cows), Hyracoidea (hyraxes) and the Equidae (horses and their kin) as representatives of the Mesaxonia. In addition five families of the Artiodactyla, namely, pigs (Suidae), peccaries (Tayassuidae), hippos (Hippopotamidae), camels and their South American kin (Camelidae), chevrotains (Tragulidae) as well as ruminants with horns or antlers (Pecora) were considered. Insectivores without a caecum (Lipotyphla) were included as an outgroup. The following interrelationship for the considered taxa was found ( Fig. 8a): (((Sirenia, (Proboscidea, (Hyracoidea, Equidae), (((((Pecora, Tragulidae), Camelidae), Hippopotamidae), Tayassuidae), Suidae)))), (Ziphiidae, (other Odontoceti, Mysticeti))), Insectivora). Because of the improbability of the relationships within the Cetacea and because of the absence of a sister‐group relationship between Tayssuidae and Suidae an enforced tree was drawn and discussed ( Fig. 8b): ((Sirenia, (Proboscidea, (Hyracoidea, Equidae), ((((Pecora, Tragulidae), Camelidae), Hippopotamidae), (Suidae, Tayassuidae))))), ((Ziphiidae, other Odontoceti), Mysticeti)), Insectivora). A stomach lined exclusively with glandular mucosa with an oesophagus that opens at the level of the mesenteric plane is plesiomorphic for ungulates. Hippopotamids are clearly grouped with the artiodactyls; there is no close relationship between whales and hippopotamids. The stomachs of hippos and whales are only superficially similar; close inspection shows major differences. All ungulates – Sirenia, Proboscidea, Hyracoidea, Equidae and Artiodactyla – are clearly separated from the Cetacea. The differentiation of a caecum in the Mysticeti could be related to their diet of planktonic crustaceans, which is rich in chitin that cannot be digested with the host’s own digestive enzymes (auto‐enzymatic digestion). Further investigations are needed to resolve this problem. This is also true for the degree of carbohydrate digestion in the large intestine of tayassuids. Hyracoidea and equids (Mesaxonia – unambiguous data for Tapiridae and Rhinocerotidae were not available to the present author) form a monophyletic group.

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The Organogenesis and early histogenesis of the bovine stomach

Warner

1958

Am. J. Anat.

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Die Entwicklung des Vorderdarmes, insbesondere des Magens der Wiederkäuer

Cited by 21 publications

References 19 publications

The embryonic development of the bovine stomach revisited

The embryonic development of the bovine stomach revisited

Evidence from the digestive tract on phylogenetic relationships in ungulates and whales

The Organogenesis and early histogenesis of the bovine stomach

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