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. Author manuscript; available in PMC: 2018 Jul 1.
Published in final edited form as: Semin Cell Dev Biol. 2016 May 10;67:123–131. doi: 10.1016/j.semcdb.2016.05.006

Figure 1. Examples of seamless tubes.

Figure 1

(A, B) Vertebrate capillaries are a mix of multicellular, seamed unicellular and seamless tubes. Drawings of adult rat and embryonic zebrafish capillaries based on [2] and [15]. (C) The Drosophila trachea contains two seamless tube types, terminal cells and fusion cells. Drawing of third instar larval branch tip based on [31]. (D) The C. elegans excretory system contains two seamless tube types, the canal cell and duct. Drawing of early L1 larval excretory system based on [41] and [84].