The pulmonary vasculature, in domestic anirnals, has received the attention of many investigators as Guszal ugSZ), Scherone (1985), Ehrsam (19S?), Adrian (1959 & 1964), Moorhead and Gross (1965) and Osman (1924). In spite of this, nothing could he traced on the pulmonary vasculature of the donkey. Therefore, this work was und.ertaken
as an attempt to obtain deta. iled morphologicat informations on the pulmonary vasculature and to ascertain an exact nomenclature for the pulmonary trunk of the donkey, in cornparison with that of other domestic animals.