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Excretory System Worksheet What are the main functions of the excretory system? __________________________________ ___________________________________ Diagram Source: http://library.thinkquest.org/10348/ What are the main organs of the excretory system that eliminate urea, excess water, and other materials from the body? ________________________________________________________________________ Using this diagram of a nephron, the filtering factory of the kidney, label and describe the 4 steps used to eliminate wastes from the body. diagram source: http://www.rcs.rome.ga.us/hargett/anatomy/urine/nephron.htm The other organs of excretion are the lungs, skin, and liver. What roles do they play in eliminating wastes from the body? __________________________________________________________________ __________________________________________________________________ __________________________________________________________________ HW: Complete a flow chart showing how the kidney eliminates wastes from the body. Excretory System Worksheet Answer Key What are the main functions of the excretory system? To collect waste from the body and remove it. Diagram Source: http://library.thinkquest.org/10348/ What are the main organs of the excretory system that eliminate urea, excess water, and other materials from the body? 2 kidneys, ureter, urinary bladder, urethra Blood flow from an artery into a nephron The filtered material passes through a series of twisted tubes surrounded by capillaries that reabsorb the glucose and water, leaving the urea. Blood goes to a capillary cluster where urea, glucose, water, and other materials are filtered out. The filtered material passes into a capsule. The remaining liquid is urine. The other organs of excretion are the lungs, skin, and liver. What roles do they play in eliminating wastes from the body? The lungs remove carbon dioxide and water, the skin excretes water and chemicals through the sweat glands, and the liver breaks down substances so they can be excreted.
