The diaphragm in man : a record of our present knowledge of its development, relationships, structure and mode of action / by J.F. Halls Dally.

  • Dally, J. F. Halls (John Frederick Halls), 1877-
Date:
[1908?]
Catalogue details

Licence: Public Domain Mark

Credit: The diaphragm in man : a record of our present knowledge of its development, relationships, structure and mode of action / by J.F. Halls Dally. Source: Wellcome Collection.

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    < a” a. sain € pga Lave allies ae Leh x ; , an ; c a ae LU GIT 1st. a RQZ ard UMRARY k ix rw Oye ay (Pp ee THE DIAPHRAGM IN MAN. A RECORD OF OUR PRESENT KNOWLEDGE OF ITS DEVELOPMENT, RELATIONSHIPS, STRUCTURE, AND MODE OF ACTION. nig eS at ip Ove Aleme st e oy i. BY abdomen it touches and is touched by the chief atria mortis. Primarily a muscle concerned. only with circulation, at a later developmental stage it has been put to many other uses, of which its action in respiration is the chief. In inspiration it enters into direct dssociate action with certain of the thoracic and spinal muscles; in expiration it is antagonised by the muscles of the abdomen; in deglutition it aids the buccal, pharyngeal, and cesophageal muscles; and in phonation, the laryngeal. These muscular actions are co-ordinated by means of neurons of association, whereby the nerves of the diaphragm are caused to enter into definite nerve-systems or combinations in order to effect the required movements. Primarily the abdominal musculature drove on the blood, the heart-force being expended chiefly in the gills; later, upon the introduc- tion of lungs in connection especially with ribs and negative pressure, the abdominal wall also became respiratory; in the beginning, however, both diaphragm and body-wall were cir- culatory. VOL. XLIY. L
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