Tic Vessels for Tke Transport of Lymph

Present knowledge concerning the transport of lymph has been gained primarily from study of the effect of extrinsic factors on lymph floW. The influence of muscular movement, respiration, pulse, vascular changes, massage, etc., has been extensively reviewed by Drinker and Yoffey (1). Study of the possible intrinsic mechanisms involved in the transport of lymph, on the other hand, has received but scant attention. During a recent investigation of acute popliteal lymphadenitis in rats (2), it was observed that peripheral afferent lymphatics leading to the popliteal lymph node contract rhythmically. Review of the scattered information relating to lymphatic physiology revealed that such rhythmic movement had not previously been recorded for the most peripheral lymphatics.