Excretory System

What is the main function of the excretory system?

• to collect and remove wastes from the body
• to strengthen skeletal muscles
• to protect the nervous system
• to bring oxygen to body cells

Which excretory organ eliminates water and some salts in perspiration?

• lungs

• skin

• liver

• kidneys

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

Which organ converts toxic ammonia (a by-product of protein metabolism) into urea?

• liver

• kidneys

• urinary bladder

Which organ of the excretory system stores urine until the body is ready to eliminate it?

• ureters
• urethra
• urinary bladder
• urea

Under normal conditions, which of the following substances is found in urine?

• blood cells
• protein
• glucose
• urea

What is the main function of the Excretory System?

• to excrete saliva

• get rid of waste products from your cells

• break down food for digestion

• circulate oxygen

These organs are responsible for what?

• storing urine
• storing water
• filtering blood
• they don't have a particular job 

What are the filtering units of the kidneys?

• nephrons

• ureters

• nuerons

• alveloi

What are kidney stones?

• crystallized bile

• crystallized urine

• crystallized saliva