. The anatomy of the domestic fowl . Domestic animals; Veterinary medicine; Poultry. THE RESPIRATORY APPARATUS IQQ (Fig. 6i, C). At this point the ciUated epithelial cells give way to simple squamous epitheUimi. Thus we find three kinds of bronchi, or their ramifications, as follows: the primary, the secondary, and the tertiary. The Air-sacs (,i4).—The air-sacs are bladder-like structures consisting of a deUcate cellulo-serous membrane, an extension from the bronchial tubes, in some places strengthened by an external envelope of elastic fibrous tissue. Long thin blood-vessels are dis-. 9
. The anatomy of the domestic fowl . Domestic animals; Veterinary medicine; Poultry. THE RESPIRATORY APPARATUS IQQ (Fig. 6i, C). At this point the ciUated epithelial cells give way to simple squamous epitheUimi. Thus we find three kinds of bronchi, or their ramifications, as follows: the primary, the secondary, and the tertiary. The Air-sacs (,i4).—The air-sacs are bladder-like structures consisting of a deUcate cellulo-serous membrane, an extension from the bronchial tubes, in some places strengthened by an external envelope of elastic fibrous tissue. Long thin blood-vessels are dis-. 9 0 Fig. (>i,A.—Diagram of air-sacs and their location, i. The proximal end of the humerus. 2, The proximal end of the right clavicle. 3, The cervical air cell. 4, The right coracoid bone. ' 5, The anterior thoracic^ir ceU. 6, The right side of the sternum. 7, The right side of the liver. 8, The peritoneum. 9, The right abdominal air cell. 10, The coccyx. 11, The proximal end of the right femur. 12, The right supero-posterior air-sac. 13, The right infero-posterior air-sac. 14, The right lung. 15, The axillary extension of the air-sac. 16. The obturator foramen, 17. The pelvis. tributed in the substance of these walls. They are branches from vessels of the general circulation and not extensions from those of the lungs. No lymphatics have been found in the air-sacs. These sacs do not communicate with each other and normally they are not fully inflated. In some locations they extend into the bones and are in communication with the extensions of the bronchial tubes. In fact, by some anatomists they have been called "bladder- Uke, extra-pulmonary expansions of the bronchial tubes, free from ; The air-sacs make the bird's body hghter, thus making. 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
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Keywords: ., bookcentury1900, bookdecade1910, bookpublishe, booksubjectpoultry
