Health 10-3 Flashcards

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?

A watery fluid produced by the kidneys that contains urea and other wastes. Signup and view all the answers

What are nephrons?

Tiny filtering units in each kidney that remove wastes and produce urine. Signup and view all the answers

What is the glomerulus?

A cluster of tiny blood vessels in a nephron where waste filtration begins. Signup and view all the answers

What are the main organs of excretion?

The kidneys, ureters, bladder, and urethra. Signup and view all the answers

How does filtration and urine production occur in nephrons?

Wastes are filtered from the blood in stages, with needed materials returned to the blood. Signup and view all the answers

What are two ways to keep your excretory system healthy?

Drink plenty of water and see a doctor if you have symptoms of an infection. Signup and view all the answers

How is dialysis used to treat kidney failure?

A machine filters wastes from the blood and then returns it to the body. Signup and view all the answers

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.

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.