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Meckel's cartilage arises from the first pharyngeal arch. The dorsal end of each cartilage is connected with the ear-capsule and is ossified to form the malleus ; the ventral ends meet each other in the region of the mandibular symphysis , and are usually regarded as undergoing ossification to form that portion of the mandible which contains ...
The mandibular prominence, or mandibular process is an embryological structure which gives rise to the lower portion of the face.. The mandible and lower lip derive from it. [1]
In contrast to the Meckel's cartilage of the first pharyngeal arch it does not constitute a continuous element, and instead is composed of two distinct cartilaginous segments joined by a faint layer of mesenchyme. [15]
The theory of recapitulation, also called the biogenetic law or embryological parallelism—often expressed using Ernst Haeckel's phrase "ontogeny recapitulates phylogeny"—is a historical hypothesis that the development of the embryo of an animal, from fertilization to gestation or hatching (), goes through stages resembling or representing successive adult stages in the evolution of the ...
Following on the ideas of Étienne Geoffroy Saint-Hilaire (1818), and studies by Johann Friedrich Meckel the Younger (1820), Carl Gustav Carus (1818), Martin Rathke (1825), and Karl Ernst von Baer (1828), [5] the relationship between the reptilian jaw bones and mammalian middle-ear bones was first established on the basis of embryology and comparative anatomy by Karl Bogislaus Reichert (in ...
Pattern of the pharyngeal arches.I-IV pharyngeal arches, 1-4 pharyngeal pouches (inside) and/or pharyngeal grooves (outside) a Lateral lingual swellings b Median tongue bud c Foramen cecum
The postdentary trough is a skeletal feature seen in Mesozoic mammals.It is found on the inside of the lower jaw (), at the back behind the molar teeth.It is the hollow in which the postdentary bones and Meckel's cartilage sit.
Musculature and cartilage of larynx (along with the sixth pharyngeal arch). ... hednk-022—Embryo Images at University of North Carolina; Outline at howard.edu ...