What is the primary function of excretion in the human body?

To remove harmful and unwanted waste products produced during metabolism.

Which of the following is NOT an excretory organ? A) Kidneys B) Lungs C) Stomach D) Skin

C) Stomach

True or False: Urea is a byproduct of the breakdown of excess carbohydrates.

False. Urea is a byproduct of the breakdown of excess amino acids.

Riddle: I am a small unit in the kidney, filtering blood to make urine. What am I?

Nephron

The urinary bladder is responsible for ______ urine until it is ready to be excreted.

Storing

True or False: The urethra is longer in females than in males.

False. The urethra is longer in males and shorter in females.

What role do the kidneys play in osmoregulation?

They maintain water and salt balance in the blood.

Fill in the blanks: Excess _______ soluble vitamins are eliminated through urine.

Water

Which organ produces bile pigments that give urine its yellowish color?

Liver

What are kidney stones primarily formed from?

Substances like calcium oxalate, calcium phosphate, or uric acid.

True or False: The kidneys filter approximately 1 liter of blood every hour.

False. The kidneys filter approximately 1 liter of blood per minute.

Riddle: I help cool the body when I evaporate, containing water and salts. What am I?

Sweat

Which of the following substances is NOT typically found in normal urine? A) Urea B) Glucose C) Water D) Uric acid

B) Glucose

What happens in the kidneys when a person is dehydrated?

Less frequent urination and more concentrated urine is produced.

True or False: Kidney failure can lead to a buildup of waste in the blood.

True.

What is the main function of the renal pelvis in the kidney?

To drain urine into the ureters.

Fill in the blanks: The kidneys contain approximately ______ renal tubules.

2 million

Which organ is primarily responsible for removing carbon dioxide from the body?

Lungs