Science 8 Unit B Excretory System

What is the major organ of the excretory system?

• Lungs

• Heart

• Brain

• Kidney

What is the function of the urethra?

• It prevents urine from leaking out of the bladder

• It allows urine to flow from the bladder until it's excreted

• It filters urea out of the bloodstream

• It transfers urine from the kidneys to the liver

True or False : one of a million tiny filtered structures found in the kidneys that removes wastes from blood and produces urine is called nephrons

• True

• False

True or False : urine travels from the kidneys through the ureters to the urnary bladder. It is then eliminated through the urethra.

• True

• False

What function do the kidneys perform?

• eliminate carbon dioxide
• supply oxygen to body cells
• remove urea and excess water
• play a role in gas exchange

What is #3?

• Kidney
• Ureters
• Bladder
• Urethra

Tags

NGSS.MS-LS1-3

How many kidneys do you have?

• 1
• 3
• 5
• 2

Which organ system removes cellular wastes as the result of cellular respiration?

• nervous
• digestive
• excretory
• circulatory

What organ is D pointing to?

• Ureters
• Bladder
• Urethra
• Kidney

What organ is C pointing to?

• Ureters
• Bladder
• Kidney
• Urethra