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 |  | | The dog's respiratory system | | The dog's respiratory system | | Respiration is the function that allows an organism to take in oxygen and eliminate carbon dioxide. A dog's respiratory system can be divided into two parts: the upper respiratory tract and the lower ... |
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 |  | | The dog's blood and lymph circulation | | The dog's blood and lymph circulation | | Study of the circulatory system includes the blood vessels (veins and arteries) and the heart in both anatomical and physiological contexts. Adult and fetal circulation differ and so will be studied s... |
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 |  | | The dog's urinary system | | The dog's urinary system | | The kidney consists of an outer cortex; the medulla, which is inside; and the renal pelvis, a collecting pocket that extends into the ureter. |
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