1
Q
What is respiration?
A
Respiration is the process by which the body exchanges gases (oxygen and carbon dioxide) and produces energy. It includes both external and internal respiration.
2
Q
What is the difference between internal and external respiration?
A
Internal respiration: Occurs inside cells (mitochondria); uses O₂ and produces CO₂ and energy (ATP).
External respiration: Involves gas exchange between the atmosphere and body cells through the lungs and blood.
3
Q
A
Second year
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