Medical Quiz
Circulation and Excretion Quiz

Urea is a product of the breakdown of proteins and nucleic acids. Where is it produced in the body?

A. liver

B. kidney

C. lung

Select your answer:
A  B  C  D  E 

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Other quiz: Respiratory System

To go on living, the body’s cells need food, water, chemicals and …

A. Helium

B. Oxygen

C. Nitrogen

D. Carbon Dioxide