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Excretion and Homeostasis 500
Filtration
Vocabulary
Lungs, Skin, Liver, and Kidney
Fun Facts
100
What does homeostasis do?
Keeps the internal environment stable.
100
What is filtered out of the blood?
Wastes and other needed materials.
100
Guess the vocabulary word: The process by which wastes are removed from the body.
Excretory system.
100
How does your kidney contribute to the excretory system?
It removes urea and other wastes from the blood.
100
Fill in the blank: Urine and other fluids can be analyzed to detect early signs of ________.
disease.
200
Excretion maintains homeostasis by doing what?
Keeping the body’s internal environment stable and free of harmful levels of chemicals
200
What is eliminated from the body?
All wastes.
200
Guess the vocabulary word: Chemicals that come from the breakdown of proteins.
Urea.
200
How does the liver contribute to the excretory system?
Breaks down waste so that it can be excreted.
200
Fill in the blank: Using a filter is the same function that __________ makes.
Kidneys.
300
Eliminating wastes, such as urea, excess water, and carbon dioxide is important for maintaining _________.
Homeostasis.
300
What is returned to the blood?
Needed materials.
300
Guess the vocabulary word: A small tube where urine leaves the body.
Urethra
300
How do the lungs contribute to the excretory system?
When you exhale some water and carbon dioxide are removed from the body.
300
How many nephrons are in a kidney
Around 1 million
400
Along with the kidneys, organs of excretion that maintain homeostasis include _______, ________, and ________.
Lungs, skin, and liver.
400
Name the last step of the filtration process.
All wastes are eliminated from the body.
400
Guess the vocabulary word: It is a major organ of the excretory system which removes urea and other wastes from the blood.
Kidney.
400
How does the skin contribute to the excretory system?
Sweat glands in the skin excrete urea and water through perspiration.
400
Fill in the blank: Sweating can effect the amount of ________ in your body.
Wastes.
500
How do the kidneys help to maintain homeostasis?
By regulating the amount of water in your body.
500
The structures of the excretory system include what?
Kidney, urinary bladder, and urethra.
500
Guess the vocabulary word: A watery fluid that that contains urea and other wastes.
Urine.
500
Where are the kidneys in a human body?
Right below the rib cage.
500
What is one example of the lungs working in the excretory system?
When you breathe on a cold day and can see it.