Question

State the differences between breathing and respiration.

Answer 1

Sr. No.	Breathing	Respiration
1.	It is a purely physical and mechanical process.	It is a biochemical process.
2.	It simply involves taking in oxygen and expelling carbon dioxide.	It involves the actual oxidation of glucose to produce energy, water, and carbon dioxide.
3.	No biological enzymes are involved in this process.	A large number of respiratory enzymes control the entire reaction.
4.	It occurs outside the cells (extracellularly), involving organs such as the lungs.	It occurs inside the cells (intracellular), specifically in the cytoplasm and mitochondria.
5.	It consumes energy because muscles contract to expand the chest cavity.	It releases energy as ATP molecules.