700 



THE VEINS. 



tissue. Communicating largely between each other by multiple anastomoses, like 

 the solar plexus, they appear to be completely isolated from the deeper parts, 

 from which it is commonly believed they emanate. 



" Tortuous and split up into branches in their course, the podophyllous veins 

 wind in a serpentine manner along the length of the laminae they cover, very 

 close to each other, and forming narrow elongated meshes. Their confluence is 

 such, that at certain points they appear bound together by their external walls. 



" The calibre of these vessels is tolerably uniform throughout the extent of 

 the podophyllous plexus, except towards the posterior parts, where their principal 

 canals empty themselves into the coronary plexus. 



" The podophyllous veins are in anastomotic communication, below, with the 



circumflex vein of the solar plexus. 

 Fig. 388. which they concur to form, and 



above, with the coronary plexus, 

 which is only a continuation of them. 

 " C. Coronary Venous Plexus. 

 — The coronary venous plexus (Fig. 

 388, 2, 4) is arranged like a ramose 

 garland around the second phalanx 

 to the origin of th-i third, and on the 

 surface of the cartilaginous apparatus 

 which completes the latter. 



"It is supported, like the other 

 venous networks of the digit, by a 

 fibrous texture immediately subjacent 

 to, and continuous with, the corium 

 of the coronary substance, and is 

 juxtaposed, as well as adherent, to 

 the expansion of the extensor tendon, 

 the lateral cartilages, and to the 

 bulbous enlargements of the plantar 

 cushion. 



" This plexus proceeds from the 

 intra-osseous, podophyllous, and solar 

 networks. To facilitate its descrip- 

 tion, we recognize it in three parts : 

 one cmtral and anterior, situated between the two cartilaginous plates, and two 

 lateral, corresponding to these cartilages. 



"Central Part of the Coronary Plexus. — The central part of the 

 coronary plexus (Fig. 388, 2), immediately subjacent to the substance or cushion 

 of that name, constitutes a very close network formed by innumerable venous 

 radicles, which rise in a tortuous manner from, and are continuations of, the 

 podophyllous plexus, until they reach a large anastomotic vein thrown across 

 from one cartilaginous plexus to the other, and into which they open by from 

 ten to twelve principal mouths (Fig. 388, 3'). 



" These veins of the central part of the coronary plexus gradually increase in 

 calibre, and diminish in number, from the podophyllus plexus, where they take 

 their origin, to their superior and terminating canal, which itself only appears to 

 be the result of their successive anastomoses. 



" Cartilaoinous Plexus, or Lateral Parts of the Coronary Plexus. 



THE VEINS OF THE FOOT. 



