The bronchi and pulmonary blood-vessels : their anatomy and nomenclature with a criticism of Professor Aeby's view on the bronchial tree of mammalia and of man / by William Ewart.

  • William Ewart
Date:
1889
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Licence: Public Domain Mark

Credit: The bronchi and pulmonary blood-vessels : their anatomy and nomenclature with a criticism of Professor Aeby's view on the bronchial tree of mammalia and of man / by William Ewart. Source: Wellcome Collection.

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    Dybkowski (Arbeiten aus der Physiolog., Anstalt in Leipzig, 1866) stomata had previously described the existence of stomata in the parietal pleura : Seura. these stomata are stated to be absent from the pleura which covers the ribs, although present in their interspaces. [The following observations, quoted by Landois (Text-book of Physio- logy, Stirling's translation, vol. i. p. 224, I 883) refer to the fine anatomy of the infra-pulmonary system :— According to Pierrefc and Renaut every air-cell of the lung of the ox is surrounded by a large lymph space, such as occurs in the salivary glands. Notlmagel found that, if blood was sucked into the lung of a rabbit, the Rapid blood corpuscles were discovered within the interstitial connective-tissue of exh-av- of the lung after 3^-5 minutes, and he concludes that the communica- sated blocd tions between the cavity of the air-cells and the lymphatics must be very numerous. According to Klein, pseudo-stomata, opening into the canaliculi, exist in Pseudo- the cement-substance uniting the epithelial cells of the alveolus: they are between most easily seen in the distended air-cell. They would afford passage for areolar lymph corpuscles and particles of pigment; but according to v. Wittich denied the latter are independent of any pre-existing apertures and make their way 5 °me' through the soft semi-fluid cement-substance.] Intra-alveolar Channels.—Wiwodzoff (Wiener Med. Jahrb., Bd. xi. 1866). quoted by Klein (lor. tit., p. 29), describes, in the connective-tissue of the alveoli of dogs and horses, small lymph canals, the larger of which run parallel to the elastic fibres, and then follow the course of 1 he capillary blood-vessels, but in many cases cross the latter, and in their meshes become Canaliculi confluent, so as to form lacuna'. lacunro. Sikorsky (Centralblatt fur Med. Wiss., No. 52, 1870), quoted by Klein (lor. city, likewise described canaliculi and laeume, the latter being situated at the nodes where the canaliculi anastomose, and exclusively in the meshes between capillary blood-vessels. G.—The Nerve-supply to the Lungs. An anterior and a posterior* pulmonary plexus are stated to be formed by Anterior branches of the vagus in association with sympathetic fibres ; and their branches terior°S' enter the root of the lung and accompany the bronchial divisions. Remak, j||'1^n'-v and subsequently Stirling, have described in connection with these nerves, solitary and grouped ganglia of minute size. The pulmonary branches of the vagus are divided by Quain into two sets, Pulmonary distributed to the anterior and to the posterior aspect of the root of the lung, from vagus '■ The anterior pulmonary nerves, two or three in number, are of small size, anterior, They join with filaments of the sympathetic ramifying on the pulmonary Bmaller'' artery, and with these nerves constitute the anterior pulmonary plexus.
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