(i) Gaseous exchange : Intake of oxygen from the atmosphere and release of CO2 —? Breathing
(ii) Breakdown of simple food in order to release energy inside the cell —?Cellular Respiration
Breakdown of Glucose by various pathways
Human Respiratory System
Passage of air through the respiratory system.
Nostril —?Nasal Passage —?Nasal Cavity —?Pharynx —?Larynx —?Trachea —?Bronchi —?Lungs
—?Bronchioles —?Alveolar —?Blood capillaries
HUMAN RESPIRATORY SYSTEM
STRUCTURE OF ALVEOLI
Terrestial Organism – use atmospheric oxygen for respiration
Aquatic Organisms – used dissolved oxygen for respiration
Respiration in Plants :
Respiration in plants is simpler than the respiration in animals. Gaseous exchange occur through
1. Stomata in leaves
2. Lenticels in stems
3. General surface of the roots.