Human Excretion

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Questions and Answers

Which of the following is NOT considered a waste product excreted by humans?

Excess water
Urea
Amino acids (correct)
Carbon dioxide

The kidneys are located at the front of the abdomen.

False (B)

Name one of the two primary functions of the kidneys.

Regulate water content in the blood or excrete/remove the toxic waste products of metabolism

The kidney regulates water content and filters blood and branches off the ______

aorta Signup and view all the answers

What is the role of the ureters in the excretory system?

Transporting urine from the kidneys to the bladder (D) Signup and view all the answers

The bladder's primary function is to filter waste products from the blood.

False (B) Signup and view all the answers

What is the name of the liquid formed from filtered excess water, salts, and urea?

Urine Signup and view all the answers

Purified blood returns to the circulation through the renal ______.

vein Signup and view all the answers

Match the following components of the excretory system with their functions:

Kidneys = Filters blood and regulates water content Ureters = Transports urine to the bladder Bladder = Stores urine temporarily Urethra = Expels urine from the body Signup and view all the answers

Which blood vessel brings blood to the kidney?

Renal artery (D) Signup and view all the answers

Flashcards

What is Excretion?

The process of removing waste materials from the body. In humans, this includes carbon dioxide, urea, and excess water.

What are the Kidneys?

Organs located in the back of the abdomen that regulate water content in the blood and remove toxic waste products of metabolism.

What is the Renal Artery?

The renal artery brings blood to the kidney, branching off the aorta.

What are Ureters?

Tubes that transport urine from the kidneys to the bladder.

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What is the Renal Vein?

The renal vein carries purified blood from the kidney back into circulation.

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What is Urine?

A liquid consisting of filtered excess water, salts, and urea.

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What is urea?

Waste substance made in liver cells from excess amino acids.

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Study Notes

Excretion is the removal of waste materials from the body

Human Waste Products

Carbon dioxide is produced by body cells
Urea is made in liver cells from excess amino acids
Excess water is not needed by the body

Kidneys

The kidneys are located in the back of the abdomen
Function to regulate water content in the blood
Function to excrete/remove the toxic waste products of metabolism
Blood is brought to the kidney in the renal artery which branches off the aorta
The kidney regulates/controls the water and salt content and removes urea
The filtered excess water, salts, and urea form a liquid called urine
Urine is transported to the bladder along tubes called ureters
The bladder stores the urine until it is convenient to expel it from the body through the urethra
Purified blood returns to circulation through the renal vein and to the heart through the vena cava