Uriniferous Tubes

A diagram of the sections of uriniferous tubes. A, Cortex limited externally by the capsule; a, subcapsular layer not containing Malpighian corpuscles; a’ inner stratum of cortex, also without Malpighian capsules; B, boundary layer; C, papillary part ext the boundary layer; I, Bowman’s capsule of Malpighian corpuscle; 2, neck of capsule; 3. proximal convoluted tubule; 4, spiral tubule; 5, descending limb of Henle’s loop; 6, the loop proper; 7, thick part of the ascending limb; 8, spiral part of ascending limb; 9, narrow ascending limb in the medullary ray; 10, the irregular collecting tube of the boundary layer; 15, the large collecting tube of the papillary part which, joining with similar tubes, forms the duct.

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