Paper - Growth allometry of the myocardium in human embryos from stages 15 to 23
|Embryology - 25 Nov 2020 Expand to Translate|
|Google Translate - select your language from the list shown below (this will open a new external page)|
العربية | català | 中文 | 中國傳統的 | français | Deutsche | עִברִית | हिंदी | bahasa Indonesia | italiano | 日本語 | 한국어 | မြန်မာ | Pilipino | Polskie | português | ਪੰਜਾਬੀ ਦੇ | Română | русский | Español | Swahili | Svensk | ไทย | Türkçe | اردو | ייִדיש | Tiếng Việt These external translations are automated and may not be accurate. (More? About Translations)
Mandarim-de-Lacerda CA. Growth allometry of the myocardium in human embryos (from stages 15 to 23). (1991) Acta Anat (Basel) 141: 251-256. PMID 1755287
|Historic Disclaimer - information about historic embryology pages|
|Embryology History | Historic Embryology Papers)|
Growth allometry of the myocardium in human embryos (from stages 15 to 23)
Department of Anatomy, State University of Rio de Janeiro, Brazil.
The relative growth of the myocardium was studied in 27 staged human embryos (Carnegie stages).
The volume of the myocardium was determined for each embryo according to Cavalieri's principle (by using point-counting planimetry to determine the area of the profiles of the myocardium). The volume of the myocardium (variable Y) was correlated to embryonic crown-rump length (variable X in millimeters) and age (in days). The bivariate allometric equation was used as Y = aXb. The scatterplot was discontinuous, presenting two trends during the postsomitic period. The first part was composed of embryos staged from stages 15 to 20, and the second part by embryos staged from stages 21 to 23.
The breakpoint between these different trends was found at the level of stage 20 (embryo of 22 mm in crown-rump length and age nearly of 52 days). From stages 15 to 20, the growth rate of the myocardium was allometrically negative. On the other hand, from stages 21 to 23 this growth rate was moderately allometrically positive.
These differences in growth of the myocardium were analyzed and, at least partially, might be due to the functional circulatory increase in the peripheral vascular bed in correlation to the cardiac hemodynamic demand required at the end of the embryonic period proper.
Cite this page: Hill, M.A. (2020, November 25) Embryology Paper - Growth allometry of the myocardium in human embryos from stages 15 to 23. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/Paper_-_Growth_allometry_of_the_myocardium_in_human_embryos_from_stages_15_to_23
- © Dr Mark Hill 2020, UNSW Embryology ISBN: 978 0 7334 2609 4 - UNSW CRICOS Provider Code No. 00098G