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Questions and Answers
What is the primary function of the lungs?
Which organ is responsible for maintaining healthy blood sugar levels?
In addition to respiration, what else do the lungs expel?
What vital functions does the liver perform?
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Which statement is true about the excretory system?
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What is the primary function of the kidneys within the urinary system?
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Which structure functions as a reservoir for urine in the urinary system?
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What is the role of the urethra in the urinary system?
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Which layer of the kidneys is referred to as the renal cortex?
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How many ureters are present in the human body?
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What is a major function of the skin as an organ of excretion?
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What is the function of the urethral sphincter?
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Which organ of the urinary system carries urine from the kidneys to the bladder?
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Study Notes
Functions of the Urinary (Excretory) System
- Filters blood
- Separates toxins from nutrients
- Stores and carries urine out of the body
Organs of the Urinary (Excretory) System
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Kidneys: The main organs of the excretory system, divided into three regions:
- Renal cortex (outer layer)
- Renal medulla (inner layer)
- Renal pelvis (carries urine from the kidneys to the ureters)
- Ureters: Two thin tubes connecting the kidneys to the bladder, carrying urine.
- Bladder: A hollow, muscular organ that stores urine.
- Urethra: A tube through which urine leaves the body. The urethral sphincter helps keep urine in the bladder until voiding.
Other Organs of Excretion
- Skin: The largest organ in the body that protects against microorganisms, dehydration, UV light, and mechanical damage. It excretes sweat and eliminates compounds like NaCl and urea.
- Lungs: Primary respiratory organs that help take in oxygen and expel carbon dioxide and water vapor.
- Liver: Removes toxins from the blood, maintains healthy blood sugar levels, regulates blood clotting, and performs other vital functions.
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Description
Explore the essential functions and organs of the urinary (excretory) system, including how blood is filtered and toxins are eliminated. Learn about the roles of kidneys, ureters, bladder, and urethra, as well as the skin and lungs in excretion. Test your knowledge on these vital components of human physiology.
