Anandamide acts as a full vanilloid receptor agonist in many bioassay systems, but it is a weak activator of primary afferents in the airways. To address this discrepancy, we compared the effect of different vanilloid receptor agonists in isolated airways and mesenteric arteries of guinea pig using preparations containing different phenotypes of the capsaicin-sensitive sensory nerve. We found t...

Lymph nodes are normally found in man in the mediastinum and around the main bronchi at the hilum of the lung. A few such nodes, which have confusingly been called intrapulmonary (Pidry and Jacques, 1906; Johnston, Davies, and Davies, 1958), may also be present alongside lobar bronchi as far into the lung as the third or fourth branching of the bronchi. Aggregations of lymphocytes are common at...

The lungs of rat fetuses at various stages of gestation and lungs of infant rats were examined histochemically for acetylcholinesterase (AChE) and norepinephrine (NE). No AChE is present in the fetal lungs until 15 days of gestation. At this stage a number of large round cells appear which stain heavily for AChE. These cells disappear by the 18th day of development and at 18 days no AChE-positi...

The study was conducted on a total of three adult healthy freshly killed red foxes of both sexes weighing about 46 kg collected from Abou Rawwash, Giza, Egypt. The wall of trachea and bronchi formed of mucosa, submucosa and adventitia. The mucosa formed of pseudostratified columnar epithelium and lamina propria. The respiratory epithelium composed of tall columnar ciliated, goblet cells, basal ...