The Development of the Heart and Vascular System of Lepidosiren paradoxa

Robertson, Jane I.

doi:10.1242/jcs.s2-59.233.53

Cited by 15 publications

(3 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The valve shape is highly variable. There are pocket-like valves of different size, and also transverse protrusions, separated by furrows, and small incisura at the luminal side of the outflow tract, all of which have been described as valves [ 45 , 46 , 47 , 48 ].…”

Section: The Cardiac Outflow Tract Valves Of Early Sarcopterygiansmentioning

confidence: 99%

The Medical versus Zoological Concept of Outflow Tract Valves of the Vertebrate Heart

Sans‐Coma

Pozo-Vilumbrales

Fernández

et al. 2022

JCDD

View full text Add to dashboard Cite

The anatomical elements that in humans prevent blood backflow from the aorta and pulmonary artery to the left and right ventriclesare the aortic and pulmonary valves, respectively. Each valve regularly consists of three leaflets (cusps), each supported by its valvular sinus. From the medical viewpoint, each set of three leaflets and sinuses is regarded as a morpho-functional unit. This notion also applies to birds and non-human mammals. However, the structures that prevent the return of blood to the heart in other vertebrates are notably different. This has led to discrepancies between physicians and zoologists in defining what a cardiac outflow tract valve is. The aim here is to compare the gross anatomy of the outflow tract valvular system among several groups of vertebrates in order to understand the conceptual and nomenclature controversies in the field.

show abstract

Section: The Cardiac Outflow Tract Valves Of Early Sarcopterygiansmentioning

confidence: 99%

The Medical versus Zoological Concept of Outflow Tract Valves of the Vertebrate Heart

Sans‐Coma

Pozo-Vilumbrales

Fernández

et al. 2022

JCDD

View full text Add to dashboard Cite

show abstract

“…A complete atrial septum where there is no direct luminal continuity between the two atria appears to have evolved independently in anuran amphibians (frogs and toads) and in early amniotes, from the same myocardial and mesenchymal components as those in lungfishes (de Bakker, Wilkinson, & Jensen, 2015 ; Greil, 1908 , 1913 ; Jensen et al, 2019 ; Robertson, 1913 ). Evolutionarily conserved transcription factors, such as Nkx2 .…”

Section: Introductionmentioning

confidence: 99%

Low incidence of atrial septal defects in nonmammalian vertebrates

Jensen

Joyce

Gregorovičová

et al. 2019

Evolution and Development

View full text Add to dashboard Cite

The atrial septum enables efficient oxygen transport by separating the systemic and pulmonary venous blood returning to the heart. Only in placental mammals will the atrial septum form by the coming-together of the septum primum and the septum secundum. In up to one of four placental mammals, this complex morphogenesis is incomplete and yields patent foramen ovale. The incidence of incomplete atrial septum is unknown for groups with the septum primum only, such as birds and reptiles. We found a low incidence of incomplete atrial septum in 11 species of bird (0% of specimens) and 13 species of reptiles (3% of specimens). In reptiles, there was a trabecular interface between the atrial septum and the atrial epicardium which was without a clear boundary between left and right atrial cavities. In developing reptiles (four squamates and one crocodylian), the septum primum initiated as a sheet that acquired perforations and the trabecular interface developed late. We conclude that atrial septation from the septum primum only results in a low incidence of incompleteness. In reptiles, the atrial septum and atrial wall develop a trabecular interface, but previous studies on atrial hemodynamics suggest this interface has a very limited capacity for shunting. evolution, heart, patent foramen ovale, septationThis is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

show abstract

“…verursachte Deformation des Herzschlauches interpretiert, das keine funktionelle Bedeutung für die embryonale Pumpfunktion besitzen soll (Blum et al 2014;Clowes et al 2014). und auch spätere Autoren (Robertson 1914;Bremer 1928;Parsons 1930;Santer et al 1983;Icardo et al 2004)…”

Section: Resultiert Das Cardiac Looping Lediglich Aus Einem Packungsp...unclassified

Untersuchungen zur Frage der bilateral asymmetrischen Morphologie des adulten Zebrafischherzens

Schäfer¹

View full text Add to dashboard Cite

The Development of the Heart and Vascular System of Lepidosiren paradoxa

Cited by 15 publications

References 4 publications

The Medical versus Zoological Concept of Outflow Tract Valves of the Vertebrate Heart

The Medical versus Zoological Concept of Outflow Tract Valves of the Vertebrate Heart

Low incidence of atrial septal defects in nonmammalian vertebrates

Untersuchungen zur Frage der bilateral asymmetrischen Morphologie des adulten Zebrafischherzens

Contact Info

Product

Resources

About