الجهاز الدورى والجهاز الإخراجى: تركيب ووظيفة الجهاز البولى

The video tutorial explains the urinary system, responsible for removing nitrogenous waste from protein breakdown. Located in the abdominal cavity near the spine, it includes the renal artery, renal vein, kidneys, ureters, bladder, and urethra. The renal artery carries waste-laden blood to the kidneys, which filter it through millions of tiny tubules. Clean blood returns to the heart via the renal vein, while waste is sent to the ureters. Ureters transport urine to the bladder for temporary storage until the urge to urinate arises. The urethra is the final channel for urine to exit the body.

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