. Bensley's Practical anatomy of the rabbit : an elementary laboratory text-book in mammalian anatomy. Rabbits -- Anatomy. THE KIDNEYS 125 others form a long loop, the loop of Henle, extending into the medulla and back to the caj^sule. Here commences the distal tubule, which is tortuous and leads into an initial collecting tubule. This, in turn, unites with others to form a collecting tubule that passes through the medulla to enter the pelvis through the surface of the papilla. Blood capillaries again come into contact with each tubule at certain points in its course, where further excretion a
. Bensley's Practical anatomy of the rabbit : an elementary laboratory text-book in mammalian anatomy. Rabbits -- Anatomy. THE KIDNEYS 125 others form a long loop, the loop of Henle, extending into the medulla and back to the caj^sule. Here commences the distal tubule, which is tortuous and leads into an initial collecting tubule. This, in turn, unites with others to form a collecting tubule that passes through the medulla to enter the pelvis through the surface of the papilla. Blood capillaries again come into contact with each tubule at certain points in its course, where further excretion and selective reabsorption occur. The excreted fluid, urine, contains characteristic nitrogenous waste niaterials, usually mainly urea but with smaller quantities of other nitrogenous substances such. A B Fig. 72. Corrosion preparations of the larger blood vessels in the kidney of the rabbit: A, veins; B, arteries. The greater density of the vessels in the cortex as compared with the medulla is evident. as uric acid or, in most mammals, allantoin. These are formed mainly in the liver and perhaps elsewhere in the body. Homologies of Vertehraie Kidneys Like all other parts of the urinogenital system, the mammalian kidney affords in its structure and embryonic development a re- markable illustration of the extent to which the adult form and relations of an organ may depend upon ancestry, and of the greatness of the changes which ^may occur before these adult conditions are attained. In the vertebrate subphylum, three successive pairs of kidneys have been recognized. They occur in antero-posterior order in the body, they are of increasing special- ization, and their order of appearance and functional value are. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Bensley, B. A. (Benjamin Arthur), 1875-1934; Craigie, E
Size: 1482px × 1686px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookcollectionameri, bookcollectionbiodiversity
