. Biology of the vertebrates : a comparative study of man and his animal allies. Vertebrates; Vertebrates -- Anatomy; Anatomy, Comparative. 776 Biology of the Vertebrates Olfactory Membrane order, strengthened sometimes by calcified cartilage. The trunk of an ele- phant, which is a combination of a long drawn-out nose and upper lip grown together, continues to perform the primary olfactory function, even though transformed into a grasping organ. The respiratory region of the nasal chamber, the most extensive part of the olfactory mechanism, provides a place for the passage of air to and from t
. Biology of the vertebrates : a comparative study of man and his animal allies. Vertebrates; Vertebrates -- Anatomy; Anatomy, Comparative. 776 Biology of the Vertebrates Olfactory Membrane order, strengthened sometimes by calcified cartilage. The trunk of an ele- phant, which is a combination of a long drawn-out nose and upper lip grown together, continues to perform the primary olfactory function, even though transformed into a grasping organ. The respiratory region of the nasal chamber, the most extensive part of the olfactory mechanism, provides a place for the passage of air to and from the lungs. It has been described in Chapter XIII. The so-called olfactory region is the innermost recess on either side of the nasal cavity (Fig. 677). In man it is comparatively small, the olfactory mem- brane being distinguishable by its yellow- ish brown pigmentation. Although the use of the pigment here is not definitely known, it has been demonstrated that albinos which lack it have a defective sense of smell. The cellular units of the olfactory epithelium are of three kinds, namely, sustentacular, basal, and sensory. The numerous sustentacular cells are long slender supporting elements extending through the entire thickness of the. Conchae Fig. 677. Diagram showing the ex- tent and position of the olfactory membrane in man. The nasal septum is represented as cut loose along its lower margin and swung upward. (After von Brunn.) « Wi" fit. 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 Walter, Herbert Eugene, b. 1867; Sayles, Leonard Perkins, 1902-. New York : Macmillan Co.
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Keywords: ., bookcentury1900, booksubjectanatomycomparative, booksubjectverte
