Lungs

This is a diagram illustrating lungs or tracheae. b.c., the cavity in which the body fluids circulate; l, the walls of the lung, which are much thinned inpockedings of the body wall (w); ex., the external medium-usually the atmosphere-in which the oxygen is found.

Keywords

trachea, lung

Galleries

Worms

Source

Thomas Walton Galloway, Zoology A Text-Book For Secondary Schools, Normal Schools and Colleges (Philadelphia: P. Plakiston's Son & Co., 1913) 63

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