Abstract
Temperature characteristics for frequency of myogenic heart beat in Limulus embryos, before the onset of nervous control of the heart, were found to be 11,500; 16,400; 20,000; 25,500. The two first values are the best established. The different values pertain to the hearts of different individuals outwardly similar, and to the hearts of single embryos in different parts of the temperature range. These values differ from that known in connection with the control of the heart beat through the cardiac ganglion. The occurrence of critical temperatures, also, is not the same in all embryos. These facts are employed in a discussion of temperature relations in pulsating explants of chick myocardium.
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Selected References
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- Cohn A. E., Assistance of Edith L. Wile PHYSIOLOGICAL ONTOGENY : A. CHICKEN EMBRYOS. V. ON THE RATE OF THE HEART BEAT DURING THE DEVELOPMENT OF CHICKEN EMBRYOS. J Exp Med. 1925 Aug 31;42(3):291–297. doi: 10.1084/jem.42.3.291. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Meek W. O. Tuberculous Endocarditis. Proc R Soc Med. 1908;1(PATHOL):116–123. doi: 10.1177/003591570800101008. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Redfield A. C., Hurd A. L. The Respiratory Function of the Hemocyanins. Proc Natl Acad Sci U S A. 1925 Feb;11(2):152–155. doi: 10.1073/pnas.11.2.152. [DOI] [PMC free article] [PubMed] [Google Scholar]