Questions and Answers
What is the function of the excretory system?
What does excretion mean?
The process of eliminating or expelling waste matter.
What waste products does the skin excrete?
Excess salts.
What are kidneys?
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What do the kidneys filter and clean?
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What are ureters?
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What is the function of the urinary bladder?
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What is the urethra?
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What is urine?
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Study Notes
Functions of the Excretory System
- The excretory system is responsible for eliminating cellular waste from the body.
- Waste is expelled through three main organs: lungs, skin, and kidneys.
Excretion
- Excretion is the process of eliminating waste matter from living organisms and cells.
Skin's Role in Excretion
- The skin excretes waste products, including excess salts, primarily through sweating.
Kidneys
- The kidneys are paired organs that filter and remove waste from the blood.
- They play a crucial role in maintaining the body's fluid and electrolyte balance.
Filtration Process in Kidneys
- Blood is filtered in the nephrons, specifically through a structure called the glomerulus.
- After filtration, the clean blood circulates through nephron tubes for further processing.
Ureters
- Ureters are tubes that convey urine from the kidneys to the urinary bladder.
- Urine is propelled through the ureters by muscular contractions.
Urinary Bladder
- The urinary bladder is a sac-like organ that stores urine until excretion.
- It can expand and contract to accommodate varying amounts of urine.
Urethra
- The urethra is the tube that allows urine to exit the body from the bladder.
Composition of Urine
- Urine is formed from water and wastes filtered from the blood, serving as the body's primary waste removal fluid.
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Description
Test your knowledge of the excretory system's functions with this quiz. Learn how the body eliminates waste through various organs such as the lungs, kidneys, and skin. Engage with definitions and key concepts related to excretion.
