416 



COMPARATIVE PHYSIOLOGY. 



FiQ. 316.— Structure of kidney (after Landois). I. Blood-vessers and tubes (Bemi-dia^ 

 grammatic). A. Capillaries of corrtoal substance. B. Capillaries of medullary 

 substance. 1, artery penetrating Malpighian body; 2, vein emerging from a Malpig- 

 hian body; B, arteriolie rectse; C. venie rectse; Y, Y, interlobular veins; S, stellate 

 veins; 1, 1, capsules of MuUer; X, X, convoluted tubes; T, T, T, tubes of Eenle; 

 N, N, N, N, communicating tubes; 0, 0, straight tubes; O, openmg Into pelvis of 

 kidney, n. Malpighian body. A, artery; Ml, vein; C, capillaries; K, epithelium 



