Department of Energy Argonne National Laboratory Office of Science NEWTON's Homepage NEWTON's Homepage
NEWTON, Ask A Scientist!
NEWTON Home Page NEWTON Teachers Visit Our Archives Ask A Question How To Ask A Question Question of the Week Our Expert Scientists Volunteer at NEWTON! Frequently Asked Questions Referencing NEWTON About NEWTON About Ask A Scientist Education At Argonne End products of cellular respiration
Name: Jessica J Tan
Location: N/A
Country: N/A
Date: N/A 

What are the end products of cellular respiration?

Mostly carbon dioxide, which must be expelled through the lungs. In mammals, the most powerful trigger causing you to breathe is the build-up of CO2 in the blood. (That's what triggers the first breath in a newborn baby which has just had its oxygen supply from the placenta cut off.) The other toxic end product of metabolism in general is ammonia, which comes from the breakdown of amino acid, which contain nitrogen. This is handled in different ways by different animals. In humans, it is converted into urea in the liver and expelled in the urine.


Click here to return to the Biology Archives

NEWTON is an electronic community for Science, Math, and Computer Science K-12 Educators, sponsored and operated by Argonne National Laboratory's Educational Programs, Andrew Skipor, Ph.D., Head of Educational Programs.

For assistance with NEWTON contact a System Operator (, or at Argonne's Educational Programs

Educational Programs
Building 360
9700 S. Cass Ave.
Argonne, Illinois
60439-4845, USA
Update: June 2012
Weclome To Newton

Argonne National Laboratory