... the support structures of the avian gas-exchange mantle. Lung tissue of two bird species belonging to strong flying birds (pigeon and barn owl) and two relatively flightless species (domestic fowl and quail) was subjected to standard processing for transmission and scanning electron microscopy after...

...M.M. Paula-Barbosa; M.A. Sobrinho-Simões; R. Faria The mossy fiber ending organelles of 4 rats and 4 pigeons were studied using ultra-structural morphometric methods. The number of agranular vesicles per square micrometer of synaptic surface, as well as the number of agranular vesicles per synapse...

...Maria A. Inforzato de Lima Presence and distribution of lipid were studied in the lining epithelia of three regions of the pigeon ( Columba livia ) crop: lateral lobes, median region near the cervical esophagus and median region near the thoracic esophagus. During the resting phase of the ‘milk...

...P.P.C. Graziadei; M. Okano The pigeon olfactory nerve has been sectioned to explore the course of retrograde degeneration of the sensory neurons’ perikarya, which are located in the olfactory neuroepithelium. Both light- and electron-microscopic observations have shown that from 3 to 8 days after...

...G.H. Parker; J.C. George The pigeon pectoralis muscle was electrically stimulated in vivo at a high intensity of 25 V and the intracellular glycogen and fat reserves of the muscle examined histochemically to determine the pattern of substrate utilization in the component broad white and narrow red...