Questions and Answers
What is the primary function of the kidneys?
Which organ is responsible for exhaling carbon dioxide?
What role do sweat glands in the skin play in excretion?
How does urine travel from the kidneys to the bladder?
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What happens when the bladder is full?
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What is the primary waste product excreted by the lungs?
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What structure temporarily stores urine before it is expelled from the body?
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How much urine can the bladder typically hold before emptying?
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What is one function of the liver in the excretory system?
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Which part of the excretory system serves as the body's plumbing?
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Study Notes
Excretory System Functions
- Eliminates metabolic waste to maintain homeostasis in the body.
- Composed of organs including kidneys, bladder, lungs, and skin.
Kidneys and Urinary Tract
- Kidneys filter blood and produce urine through the functional units called nephrons.
- Urine is transported from the kidneys via ureters to the bladder for storage.
- The bladder can hold approximately two cups of urine for two to five hours.
- Upon filling, bladder walls contract to expel urine through the urethra.
Lungs and Skin Role
- Lungs facilitate gaseous excretion by expelling carbon dioxide and water during exhalation.
- Skin excretes metabolic wastes like salts and urea through sweat glands.
Parts of the Excretory System
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Kidneys:
- Bean-shaped organs responsible for blood filtration and water balance.
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Urinary Tract:
- Eliminates wastes and excess water from blood in a structured process.
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Ureters:
- Thin tubes transporting urine from the kidneys to the bladder.
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Bladder:
- Storage for urine until signaling to expel when full.
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Urethra:
- The final tube through which urine exits the body.
Liver Functions
- Functions to eliminate excess fats and cholesterol.
- Acts as the first line of defense against various substances including hormones, alcohol, drugs, and fats.
Importance of the Urinary System
- The urinary system plays a crucial role in waste removal and maintaining internal balance.
- Ensures the body's health by efficiently processing and expelling unnecessary substances.
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Description
Explore the essential functions of the excretory system, which plays a key role in maintaining body balance by eliminating metabolic waste. This quiz covers the roles of kidneys, bladder, lungs, and skin in the processes of waste elimination and fluid regulation.
