Questions and Answers
What is excertion?
The process by which the body collects and removes wastes.
What is urea?
A substance formed in the liver from a harmful waste product of protein breakdown.
What are the kidneys?
The major organs of the excretory system that filter urea and other wastes from the blood.
What is urine?
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What are nephrons?
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What is the glomerulus?
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What are the main organs of excretion?
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How does filtration and urine production occur in nephrons?
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What are two ways to keep your excretory system healthy?
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How is dialysis used to treat kidney failure?
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Study Notes
Excretion Process
- Excretion is the body's method of collecting and eliminating waste materials.
- The major organs involved in excretion are kidneys, ureters, bladder, and urethra.
Urea Formation
- Urea is a byproduct formed in the liver by converting harmful waste from protein breakdown.
- It is safely transported through the bloodstream to the kidneys for excretion.
Kidneys and Their Function
- Kidneys are the principal organs of the excretory system, filtering urea and other wastes from blood.
- Each kidney contains approximately a million nephrons, which are tiny units responsible for waste filtration and urine production.
Urine Composition and Flow
- Urine is a watery fluid created by the kidneys containing urea and other waste products.
- Urine progresses from the kidneys through various excretory organs before exiting the body.
Nephrons and Filtration
- Nephrons perform waste filtration in stages:
- Initial filtration removes both needed substances and waste from the blood.
- Most essential materials are reabsorbed back into the bloodstream while wastes are eliminated.
Glomerulus Role in Waste Removal
- Blood enters the kidneys and flows through smaller vessels to the glomerulus, where filtration occurs.
- Urea, salt, glucose, and some water are filtered, while blood cells and large proteins remain in circulation.
Maintaining Excretory Health
- To promote kidney health, drink adequate water and consult a doctor if any infection symptoms appear.
Dialysis Treatment for Kidney Failure
- Dialysis involves using a machine to filter waste from the blood, where blood is drawn, cleansed, and returned to the body.
- Typically performed three times a week for three to five hours, dialysis can lead to various complications.
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Description
Test your knowledge of key terms in the Health 10-3 curriculum. This quiz covers important vocabulary related to the excretory system, including definitions of exertion, urea, and kidneys. Perfect for reinforcing your understanding of bodily waste removal processes.