Studies on the Primitive Lymphatic Apparatus in the Blood Vascular System of the Lungs ofMacaca cyclopis

Abstract

The development and distribution of the primitive lymphatic apparatus in the blood vascular system of the lungs in nine Macaca cyclopis were studied. There was no lymphatic apparatus formation in the suckling period. Toward the beginning of the infant period the lymphatic apparatus started to occur in the form of lymphatic infiltrations. They were mostly located in the wall of functional blood vessels 0.07-0.50 mm in caliber (Vasa pulmonalia) and were especially numerous in those 0.10-0.17 mm in caliber. However, the lymphatic apparatus was never found in the nutritive vascular system (Rr. bronchiales, Vv. bronchiales).