Sputum, the material which is usually collected for examination of respiratory mucus, is a mixture of bronchial mucus from goblet cells, bronchial gland secretions and various transudates from the bronchial mucosa. In addition, there are bacteria, lysozymes, alveolar macrophages and lymphocytes together with cellular debris. Above the larynx sputum gathers its envelope of salivary and possibly nasal mucins. Sputum is therefore a mixture of mixtures.
KeywordsShear Rate Apparent Viscosity High Shear Rate Bronchial Secretion Submucosal Gland
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