. The chordates. Chordata. Integrative Systems 211 auditory mechanisms which serve for more direct and effective trans- mission of external vibrations into the internal ear. The equilibratory mechanism of the ear shows little change in structure throughout the. Fig. 182. Diagram of the membranous labyrinth of a vertebrate, the sensory areas dotted, (ac) Anterior semicircular canal; (ap) ampullae; (ca) cristae acus- ticae in the ampullae; (de) ductus endo- lymphaticus; (he) horizontal (external) canal; (/) lagena; (ml, mn, ms, mil) respec- tively macula lagenae, m. neglecta, m. sacculi, and m.
. The chordates. Chordata. Integrative Systems 211 auditory mechanisms which serve for more direct and effective trans- mission of external vibrations into the internal ear. The equilibratory mechanism of the ear shows little change in structure throughout the. Fig. 182. Diagram of the membranous labyrinth of a vertebrate, the sensory areas dotted, (ac) Anterior semicircular canal; (ap) ampullae; (ca) cristae acus- ticae in the ampullae; (de) ductus endo- lymphaticus; (he) horizontal (external) canal; (/) lagena; (ml, mn, ms, mil) respec- tively macula lagenae, m. neglecta, m. sacculi, and m. utriculi; (pc) posterior semicircular canal; (s) sacculus; (se) saccus endolymphaticus; (sue) sacculo- utricular canal; (u) utriculus. (Courtesy, Kingsley: "Comparative Anatomy of Vertebrates," Philadelphia, The Blakis- ton Company.) vertebrate series. The auditory mechanisms of amphibians, reptiles and birds, and mammals show progressive development culminating in mammals. PROPRIOCEPTORS Afferent fibers belonging to cells situated in cranial and spinal ganglions pass into many of the deep tissues of the body, ultimately. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Rand, Herbert W. (Herbert Wilbur), 1872-1960. Philadelphia : Blakiston
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