Vol 62, No 3 (2003)
Short communication
Submitted: 2012-02-06
Published online: 2003-06-09
Provision of tricuspid valve leaflets by septal papillary muscles in the right ventricle of human and other mammal hearts
Damian Jeżyk, Janusz Jerzemowski, Marek Grzybiak
Folia Morphol 2003;62(3):309-311.
Vol 62, No 3 (2003)
SHORT COMMUNICATIONS
Submitted: 2012-02-06
Published online: 2003-06-09
Abstract
Leaflets of the tricuspid valve are provided by tendinous cords extending from the papillary muscles. The situation is complicated with the septal muscles, which generally occur in two groups, one as constant musculus coni arteriosi and the second as other variable septal muscles. We tested whether there is a variability in the provision of the tricuspid valve in different taxonomical groups of mammals. The material examined consisted of 299 hearts of mammals (Primates, Ungulata, Carnivora, Lagomorpha, Rodentia, Marsupialia). The musculus coni arteriosi in the majority of mammals provided only the front leaflet, but among Ungulata and Rodentia it provided simultaneously the front and septal leaflet. The other septal muscles provided the front, septal and even back leaflets. The
following regularity was observed: in the hearts of Primates provision of the front leaflet and the front part of the septal leaflet predominated, among Ungulata the muscles provided the middle part of the septal leaflet, but among the other mammals the rest of the septal muscles provided, significantly, the back part of the septal leaflet. Such a provision was characteristic for predators, hares, rodents and marsupials. These circumstances may allow the conclusion to be drawn that there is a taxonomical dependence in the provision of the tricuspid valve in the hearts of the mammals under examination.
Abstract
Leaflets of the tricuspid valve are provided by tendinous cords extending from the papillary muscles. The situation is complicated with the septal muscles, which generally occur in two groups, one as constant musculus coni arteriosi and the second as other variable septal muscles. We tested whether there is a variability in the provision of the tricuspid valve in different taxonomical groups of mammals. The material examined consisted of 299 hearts of mammals (Primates, Ungulata, Carnivora, Lagomorpha, Rodentia, Marsupialia). The musculus coni arteriosi in the majority of mammals provided only the front leaflet, but among Ungulata and Rodentia it provided simultaneously the front and septal leaflet. The other septal muscles provided the front, septal and even back leaflets. The
following regularity was observed: in the hearts of Primates provision of the front leaflet and the front part of the septal leaflet predominated, among Ungulata the muscles provided the middle part of the septal leaflet, but among the other mammals the rest of the septal muscles provided, significantly, the back part of the septal leaflet. Such a provision was characteristic for predators, hares, rodents and marsupials. These circumstances may allow the conclusion to be drawn that there is a taxonomical dependence in the provision of the tricuspid valve in the hearts of the mammals under examination.
Keywords
heart; tricuspid valve; septal papillary muscles
Title
Provision of tricuspid valve leaflets by septal papillary muscles in the right ventricle of human and other mammal hearts
Journal
Folia Morphologica
Issue
Vol 62, No 3 (2003)
Article type
Short communication
Pages
309-311
Published online
2003-06-09
Page views
498
Article views/downloads
1060
Bibliographic record
Folia Morphol 2003;62(3):309-311.
Keywords
heart
tricuspid valve
septal papillary muscles
Authors
Damian Jeżyk
Janusz Jerzemowski
Marek Grzybiak
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