Abstract
The purpose of this paper is to explore further the possibilities of a theory of structure (form) as determined by function. The paper is preliminary in nature and emphasis is placed more on the methodological approach than on immediately verifiable conclusions. An approximate mathematical treatment of diffusion between alveoli and blood is given, taking into account the periodic variations of the concentration of gases in the lung and in the bloodstream due to the periodicity of breathing. Expressions for the blood concentration and the alveolar concentration of oxygen as functions of time are derived in terms of the frequency of breathing and of some structural geometric parameters of the lung. It is then shown what tentative conclusions can be drawn from such considerations in regard to the structure of the lung.
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Literature
Bayliss, L. E., and G. W. Robertson. 1939. “The Visco-Elastic Properties of the Lung.”Quart. Jl. of Physiol.,29, 27–47.
Carlson, A. J., and V. Johnson. 1953.The Machinery of the Body. Chicago: The University of Chicago Press.
Cohn, D. L. 1954. “Optimal Systems: I. The Vascular System.”Bull. Math. Biophysics,16, 59–74.
—. 1955. “Optimal Systems: II. The Vascular System.” —Ibid.,17, 219–227.
Dean, Robert B., and Maurice B. Vischer. 1944. “The Kinetics of Lung Ventilation.”Am. Jl. Physiol.,134, 450–468.
Guerra, E., and B. Günther. 1954. “Similitud mecánica y electrodinámica en Biologia.”Bol. Soc. Biol., Concepción (Chile),29, 87–91.
Günther, B., and E. Guerra. 1955. “Biological Similarities.”Acta Physiol. latinoamer.,5, 169–186.
Mead, J. 1960a. “Control of Respiratory Frequency.”Jl. Appl. Physiol.,15, 325–336.
—. 1960b. “A Re-Evaluation of Effects of Acute Cèntral Congestion on Pulmonary Compliance.” —Ibid.,15, 875–877.
—. 1961. “The Mechanical Properties of Lungs.”Physiol. Rev.,41, 218–330.
Neergaard, K. v. 1929. “Neue Auffassungen über einen Grundbegriff der Atemtechnik. Die Retractionscraft der Lunge, abhängig von der Oberflächenspannung der Alveolen.”Z. ges. exp. Med.,66, 373–394.
Otis, A. B., W. O. Fenn, and H. Rahn. 1950. “Mechanics of Breathing in Man.” —Ibid.,2, 592–607.
Rahn, H., and W. O. Fenn. 1955.Graphic Analysis of Respiratory Gas Exchanges. Washington, D.C.: Am. Physiol. Soc.
Rashevsky, N. 1944. “Studies in the Physicomathematical Theory of Organic Form.”Bull. Math. Biophysics,6, 1–59.
—. 1960.Mathematical Biophysics, Physicomathematical Foundations of Biology. Vol. II, 3rd Edition. New York: Dover Publications, Inc.
—. 1961.Mathematical Principles in Biology and Their Applications. Springfield, Ill.: Charles C. Thomas.
Rohrer, F. 1915. “Der Strömungswiderstand in den Menschlichen Atemwegen und der Einfluss der Unregelmässigen Verzweigung des Bronchialsystems auf den Atmungsverlauf in Verschiedenen Lungenbezirken.”Pflüg. Arch.,162, 225–299.
—. 1916. “Der Zusammenhang der Atemkräfte und Ihre Abhangigkeit vom Dehnungszustande der Atmungsorgane.” —Ibid.,165, 419–444.
—. 1925. “Physiologie der Atembewegung,” in Bethe'sHandb. d. Norm. u. Path. Physiologie, Vol. 2, pp. 70–127. Berlin: Julius Springer.
Rossier, P. M., A. A. Bühlmann, and K. Wiesinger. 1960.Respiration. Physiologic Principles and Their Clinical Applications. St. Louis: The C. V. Mosley Company.
Wise, M. E., and J. G. Defares. 1959. “A Model for Unequal Ventilation of the Lungs, Assuming a Common Dead Space and Two Separate Dead Spaces.”Bull. Math. Biophysics,21, 343–362.
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Rashevsky, N. On the function and design of the lung. Bulletin of Mathematical Biophysics 24, 229–242 (1962). https://doi.org/10.1007/BF02477429
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DOI: https://doi.org/10.1007/BF02477429