منابع مشابه
The Avian Lung and Air-sac System
IN the following pages the author has attempted to review briefly the main contributions pertinent to an understanding of the avian lung and airsac system. Supplementing this review is a description of a method for casting the system using Woods Alloy. Casts were made of the lungs and air sacs of the Domesticated Pigeon (Columba livia). This bird was chosen because considerable work had already...
متن کاملDifferential air sac pressures in diving tufted ducks Aythya fuligula.
The air in the respiratory system of diving birds contains a large proportion of the body oxygen stores, but it must be in the lungs for gas exchange with blood to occur. To test the hypothesis that locomotion induces mixing of air sac air with lung air during dives, we measured differential pressures between the interclavicular and posterior thoracic air sacs in five diving tufted ducks Aythya...
متن کاملThe craniofacial air sac system of Mesozoic birds (Aves)
Birds are characterized by pneumatization of their skeletons by epithelial diverticula from larger, air-filled cavities. The diverticula-or ‘air sacs’-that invade the postcranium result from outgrowths of the lungs; postcranial pneumaticity has been very well studied. Much more poorly understood are the air sacs that pneumatize the skull. Study of craniofacial pneumaticity in modern birds (Neor...
متن کاملUsing Air Cushion in the Prevention of Occipital Pressure Ulcer in Children Undergoing Heart Surgery
Background & Aims:The prevalence of congenital heart (CHD) defects is about 6-8 per 1000 live births, more than half of which will require surgery during the first year of life. In Iran, the rate of diagnosis of cardiovascular diseases is increasing, so that the mortality caused by them in the intervals of 1989 to 2006 has increased from 27 to 30%. CHD accounts for almost one-third of all conge...
متن کاملTetanus Disease (Its Prevention and Treatment)
Nach dem kurzen Bericht ueber die Geschichte van Tetanus; haben wir in diesern Artikel versucht,ueber die Epedirniologie, Pathophisiologie,Aethiologie und die Frueh-und Spaet-Sympptome von dieser gcfahrlichen Krankheit,die einen Durchschnitt von 35% Mortalitaet hat,zu berichten. In disern Artikel legen wir vi.ei wert,besoaders ueber die The·.rapie 1md der Prophyla.xe. Unc:I wii' hal)en bed...
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ژورنال
عنوان ژورنال: Poultry Science
سال: 1963
ISSN: 0032-5791
DOI: 10.3382/ps.0420403