. The development of the human body : a manual of human embryology. Embryology; Embryo, Non-Mammalian. DEVELOPMENT OF THE BRANCHIAL ARCHES 97 projection of the tail filament, but also from the external genitalia being still largely visible in a side view of the embryo, a condition which will disappear in later stages. The Later Development of the Branchial Arches, and the Development of the Face.—In the embryo shown in Fig. 56, the four branchial clefts and five arches which develop in the human embryo are visible in surface views, but in the Ruge embryo (Fig. 57) it will be noticed that only
. The development of the human body : a manual of human embryology. Embryology; Embryo, Non-Mammalian. DEVELOPMENT OF THE BRANCHIAL ARCHES 97 projection of the tail filament, but also from the external genitalia being still largely visible in a side view of the embryo, a condition which will disappear in later stages. The Later Development of the Branchial Arches, and the Development of the Face.—In the embryo shown in Fig. 56, the four branchial clefts and five arches which develop in the human embryo are visible in surface views, but in the Ruge embryo (Fig. 57) it will be noticed that only the first two arches, the first with a well- developed maxillary process, and the cleft separating them can be. Fig. 61.—Head of Embryo of mm. na, Nasal pit; ps, precervical sinus.—(His.) distinguished. This is due to a sinking inward of the region occu- pied by the three posterior arches so that a triangular depression, the sinus pracervicalis, is formed on each side of what will later become the anterior part of the neck region. This is well shown in an embryo (Br3) described by His which measured mm. in length and of which the anterior portion is shown in Fig. 61. The anterior boundary of the sinus {ps) is formed by the posterior edge 7. 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 McMurrich, J. Playfair (James Playfair), 1859-1939. Philadelphia : P. Blakiston's son & co.
Size: 1858px × 1344px
Photo credit: © Central Historic Books / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookautho, bookcentury1900, bookdecade1910, booksubjectembryology
