. Human embryology and morphology. Embryology, Human; Morphology. 26 HUMAN EMBRYOLOGY AND MORPHOLOGY. these are constantly present in the chimpanzee and in animals with a keen sense of smell. In the human foetus of four months six turbinates are usually present, besides secondary processes in the meatuses beneath them. The uppermost of these, the sixth, becomes the sphenoidal turbinate; the fifth disappears; the third and fourth may remain separate or become united; the first and second form the inferior and middle turbinate processes. The agger nasi (naso-turbinal, Fig. 19), in front of the a
. Human embryology and morphology. Embryology, Human; Morphology. 26 HUMAN EMBRYOLOGY AND MORPHOLOGY. these are constantly present in the chimpanzee and in animals with a keen sense of smell. In the human foetus of four months six turbinates are usually present, besides secondary processes in the meatuses beneath them. The uppermost of these, the sixth, becomes the sphenoidal turbinate; the fifth disappears; the third and fourth may remain separate or become united; the first and second form the inferior and middle turbinate processes. The agger nasi (naso-turbinal, Fig. 19), in front of the attachment of the middle turbinate process, is a vestige of the naso-turbinal, a process well developed in most carnivora and animals with a strong scent. The uncinate process, which forms the lower border of the hiatus semilunaris, is continuous at its base with the naso-turbinal. Through the hiatus semilunaris acting as a gutter, the antrum may become a cesspool for a suppurating frontal sinus. Nasal Duct.âAlthough in no way connected with the sense of smell, the nasal duct is closely related to the nasal â frontal sinus lachrymal crest pars facialis uncinate process/- J' Fig. 20âShowing on the inner wall of the Orbit (1) the position of the Infundibulum, (2) the pars facialis lachrymalis. It is formed between the lateral nasal and maxillary processes (Figs. 1 and 7). Three bones bound it: the superior maxilla on the outer side, formed in the maxillary process; the inferior turbinate, formed in the cartilage of the lateral nasal process, and the lachrymal, formed over the lateral nasal cartilage, bound it on the inner side. The formation of the palate cuts the duct off from the mouth. The hamulus of the lachrymal varies much. 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 Keith, Arthur, Sir,
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectembryol, bookyear1902
