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Questions and Answers
What is the primary process by which waste products are removed from living organisms?
What is the primary process by which waste products are removed from living organisms?
- Circulation
- Respiration
- Digestion
- Excretion (correct)
Which organ is responsible for filtering the blood in the human excretory system?
Which organ is responsible for filtering the blood in the human excretory system?
- Heart
- Lungs
- Kidneys (correct)
- Liver
What happens to useful substances when blood is filtered in the kidneys?
What happens to useful substances when blood is filtered in the kidneys?
- They are absorbed back into the blood (correct)
- They remain in the urine
- They are expelled as urine
- They are converted to toxins
What is the waste material that is dissolved in water and removed from the body?
What is the waste material that is dissolved in water and removed from the body?
Which structure stores urine before it is excreted from the body?
Which structure stores urine before it is excreted from the body?
What is the primary function of the kidneys in the human excretory system?
What is the primary function of the kidneys in the human excretory system?
Which component of the excretory system stores urine until it is expelled from the body?
Which component of the excretory system stores urine until it is expelled from the body?
What percentage of urine is typically composed of water in an adult human?
What percentage of urine is typically composed of water in an adult human?
Which structure is responsible for carrying urine from the kidneys to the bladder?
Which structure is responsible for carrying urine from the kidneys to the bladder?
What happens if the excretory system is compromised?
What happens if the excretory system is compromised?
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Study Notes
Excretion in Animals
- Excretion is the removal of waste products from the body.
- Waste products are generated during cellular functions and can be toxic.
- The excretory system removes these waste products.
Human Excretory System
- The human excretory system is responsible for filtering waste products from the blood.
- It consists of the kidneys, ureters, urinary bladder, and urethra.
Structure and Function
- Kidneys: These are the main organs of excretion. They filter waste from the blood and produce urine.
- Ureters: These tubes transport urine from the kidneys to the urinary bladder.
- Urinary bladder: This organ stores urine before it is expelled from the body.
- Urethra: This tube carries urine from the bladder to the outside of the body.
- Urinary Opening: This is the opening through which urine is expelled from the body.
Additional details
- An adult human produces roughly 1-1.8 liters of urine daily.
- Urine is primarily composed of water, urea, and other waste products.
- Perspiration (sweat) is another way waste is eliminated from the body.
- The excretory system contributes to maintaining homeostasis within the body.
- Damage or disruption to the excretory system can lead to health problems.
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