The Respiratory System explains the structure, function, and regulation of breathing and gas exchange in humans. This chapter is a key component of Zoology and Human Biology, essential for Class 11–12 students, NEET aspirants, and undergraduate learners, integrating anatomy, physiology, and environmental adaptation.
In this section, you will study:
Organs of the human respiratory system
Mechanism of breathing (inhalation and exhalation)
Exchange and transport of respiratory gases
Regulation of respiration
Respiratory volumes and capacities
Disorders of the respiratory system
NCERT-aligned explanations, diagrams, MCQs, and exam-oriented questions
The content is structured to build conceptual clarity, improve physiological understanding, and prepare students for school examinations, NEET, and undergraduate assessments.
Develop a strong foundation in respiratory physiology to understand how oxygen is acquired, transported, and utilized to sustain life.
Q. What is the primary component of the respiratory system that filters and humidifies the air?
A.
Lungs
B.
Nasal cavity
C.
Bronchi
D.
Alveoli
Solution
The nasal cavity is responsible for filtering, warming, and humidifying the air before it enters the lungs.
