Latest questions in this category.
The pharynx serves as a common passage for both air (to the lungs) and food (to the esophagus).
Ref: NCERT Class 11 Biology Chapter 14: Breathing and Exchange of Gases Respiratory Organs and Human Respiratory System
Inhalation occurs when intrapulmonary pressure falls below atmospheric pressure, allowing air to flow into the lungs.
Ref: NCERT Class 11 Biology Chapter 14: Breathing and Exchange of Gases Respiratory Organs and Human Respiratory System
The larynx is known as the voice box because it contains the vocal cords responsible for sound production.
Ref: NCERT Class 11 Biology Chapter 14: Breathing and Exchange of Gases Respiratory Organs and Human Respiratory System
The nasal chamber warms, filters, and humidifies inhaled air before it reaches the lungs.
Ref: NCERT Class 11 Biology Chapter 14: Breathing and Exchange of Gases Respiratory Organs and Human Respiratory System
The trachea is supported by incomplete cartilaginous rings that prevent its collapse during breathing.
Ref: NCERT Class 11 Biology Chapter 14: Breathing and Exchange of Gases Respiratory Organs and Human Respiratory System
The larynx, also known as the voice box, contains vocal cords responsible for sound production.
Ref: NCERT Class 11 Biology Chapter 14: Breathing and Exchange of Gases Respiratory Organs and Human Respiratory System
The pleural membranes surround the lungs and reduce friction during breathing by secreting pleural fluid.
Ref: NCERT Class 11 Biology Chapter 14: Breathing and Exchange of Gases Respiratory Organs and Human Respiratory System
A decrease in temperature increases the oxygen-binding affinity of hemoglobin, promoting oxygen uptake in the lungs.
Ref: NCERT Class 11 Biology Chapter 14: Breathing and Exchange of Gases Respiratory Organs and Human Respiratory System
Bronchioles do not have cartilaginous rings; instead, they are composed of smooth muscle, which allows them to constrict or dilate.
Ref: NCERT Class 11 Biology Chapter 14: Breathing and Exchange of Gases Respiratory Organs and Human Respiratory System
During expiration, the diaphragm relaxes and moves upward, decreasing thoracic volume and increasing pressure.
Ref: NCERT Class 11 Biology Chapter 14: Breathing and Exchange of Gases Respiratory Organs and Human Respiratory System
The nasal chamber humidifies, filters, and warms inhaled air before it reaches the lungs.
Ref: NCERT Class 11 Biology Chapter 14: Breathing and Exchange of Gases Respiratory Organs and Human Respiratory System
The diaphragm is a dome-shaped muscle that separates the thoracic and abdominal cavities and plays a key role in respiration.
Ref: NCERT Class 11 Biology Chapter 14: Breathing and Exchange of Gases Respiratory Organs and Human Respiratory System
