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Morphological Characteristics and Mutual Relationships of the Tracheal Cartilaginous Rings in Gallus gallus
Author(s) -
Piperno E.,
Peirone S.
Publication year - 1975
Publication title -
anatomia, histologia, embryologia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.34
H-Index - 35
eISSN - 1439-0264
pISSN - 0340-2096
DOI - 10.1111/j.1439-0264.1975.tb00635.x
Subject(s) - anatomy , ring (chemistry) , sagittal plane , biology , chemistry , organic chemistry
Summary In the chicken the tracheal cartilages are complete circular rings of unequal width around their circumference. They are made up of a thick central part and two winglike projections, one cranial, the other caudal, gradually thinning out towards the edges. In each ring one half, left or right, is alternatively broader than the other. At the level of the sagittal median plane, each cranial and caudal margin of the ring displays two notches; at this level the change‐over point from the broad to the narrow half of the ring is seen to occur. The interconnections between contiguous rings are characteristic. The broad half of one ring with its winglike projections covers the narrow halves of the rings in front and behind, resulting in a characteristic tile‐like pattern. The broader halves of the rings lie always superficially with respect to the narrow ones which are overlaid by them and are deeper situated. This arrangement allows for a high degree of sliding movement of the rings one over the other.