An Apparatus for Measuring the Propulsive Forces of the Locomotory Muscles of the Earthworm and Other Animals | Zendy

J. Gray | Zendy; H. W. Lissmann | Zendy

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An Apparatus for Measuring the Propulsive Forces of the Locomotory Muscles of the Earthworm and Other Animals

Author(s) -

J. Gray,

H. W. Lissmann

Publication year - 1938

Publication title -

journal of experimental biology

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.367

H-Index - 185

eISSN - 1477-9145

pISSN - 0022-0949

DOI - 10.1242/jeb.15.4.518

Subject(s) - earthworm , mechanism (biology) , biology , terrestrial locomotion , measure (data warehouse) , anatomy , ecology , computer science , physics , quantum mechanics , database

1. An apparatus is described whereby it is possible to measure the propulsive forces generated during the locomotion of small terrestrial animals. 2. It is shown that the propulsive thrust of the circular muscles and the tractive force of the longitudinal muscles of an earthworm are approximately equal to each other and vary from 2 to 8 g. according to the size and activity of the worm. 3. The total frictional resistance overcome by a worm 25 cm. in length (when fully extended), moving at an average velocity of 0.4 cm. per sec., is approximately 8 g.

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