What Is Excretion?
Waste removal keeps you alive.
Wastes are toxic or poisonous and must be removed so a person stays healthy.
↳ Excretion = removal of cell-produced wastes; the excretory system does this job.
Kit Library / Science / Biology
⚡ Topic Learning KitExcretory System in Humans
English 20 leveled MCQs 36 flashcards 9 games Free
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The Three Main Waste Products
Your body makes three key wastes.
Urea enters the blood and makes it impure; if not removed constantly, the person will soon die.
↳ Carbon dioxide, urea and sweat are the main wastes produced in human body cells.
Organs of Waste Removal
Three organs, three different wastes.
↳ Lungs, kidneys and sweat glands are the three main excretory organs in humans.
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1
Excretory System in Humans
The excretory system removes toxic waste materials produced in body cells, keeping the body healthy. It covers the definition of excretion, the organs involved (lungs, kidneys, sweat glands, liver), the human urinary sys…
- Excretion is the removal of waste materials produced in the cells of living organisms.
- The organ system responsible for removing waste products from the body is called the excretory system.
- The three main waste materials produced in human body cells are carbon dioxide, urea, and sweat.
~15 min · full explanation, examples & memory tricks in the app
❓ Leveled MCQ practice
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20 questions laddered from warm-up to topper-level, each with an explanation. A taste:
The removal of waste materials produced in the cells of living organisms is called:
Beginner
A Circulation
B Digestion
C Respiration
D Excretion
Show answer & explanation
Excretion
Excretion is defined as the removal of waste materials produced in the cells of living organisms.
Which of the following is NOT an organ of waste removal in the human body?
Beginner
A Stomach
B Sweat glands
C Kidneys
D Lungs
Show answer & explanation
Stomach
The organs for waste removal in the human body are the lungs, kidneys, and sweat glands. The stomach is part of the digestive system.
Carbon dioxide is produced as a waste product during respiration and is removed by the:
Beginner
A Kidneys
B Liver
C Lungs
D Skin
Show answer & explanation
Lungs
Carbon dioxide is a gaseous waste produced during respiration and is expelled by the lungs during exhalation.
The yellowish liquid waste formed when urea and unwanted salts dissolve in water is called:
Beginner
A Urine
B Blood plasma
C Sweat
D Bile
Show answer & explanation
Urine
Urea and other unwanted salts dissolve in water to form a yellowish liquid waste called urine.
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