. Elements of the comparative anatomy of vertebrates. Anatomy, Comparative. Fig. 231.—Laryxx of Phyllodactylus europams. (A, skeleton, and B, musculature of larynx.) Ar, arytenoids ; Cf, cricoid ; S, anterior median process of cricoid ; .9\ sphincter ; D, dilator; T, trachea; Oe, basi-hyal. apparatus—more particularly the dorsal surface of the basi-hyal. In Crocodiles and Chelonians, for instance, the larynx is firmly em- bedded in a shallow depression of the latter (Fig. 76). A well-developed trachea, supported by cartilages, is present in all Reptiles; but the cartilages are not in all cases
. Elements of the comparative anatomy of vertebrates. Anatomy, Comparative. Fig. 231.—Laryxx of Phyllodactylus europams. (A, skeleton, and B, musculature of larynx.) Ar, arytenoids ; Cf, cricoid ; S, anterior median process of cricoid ; .9\ sphincter ; D, dilator; T, trachea; Oe, basi-hyal. apparatus—more particularly the dorsal surface of the basi-hyal. In Crocodiles and Chelonians, for instance, the larynx is firmly em- bedded in a shallow depression of the latter (Fig. 76). A well-developed trachea, supported by cartilages, is present in all Reptiles; but the cartilages are not in all cases fused together to form complete rings. The walls of the bronchi are also usually provided with cartilaginous supports. Birds.—In Birds there are two larynges, an ii-piKr and a lower. The former lies in the usual position behind the tongue on the floor of the pharynx, and is plainly homologous with that of other Vertebrates, though it has become rudimentary and is incapable of producing sound. The lower larynx, or syrinx, is of much gi-eater importance; it is usually situated at the junction of the trachea and bronchi, or more seldom at the lower end of the trachea alone or on the bronchi alone. It functions as the organ of voice, and appears first in, and is restricted to. Birds. In the most usual form (broncho-tracJieal syrinx), there is a movable connection between the most anterior bronchial rings, with which a complicated s)-stem of muscles is con- nected ; these, by their contraction, cause a stretching or relaxing of. 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 Wiedersheim, Robert, 1848-1923; Parker, William Newton, 1857-1923. London, Macmillan
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectanatomycomparative
