Advertisements
Advertisements
प्रश्न
What do you understand by inhalation and exhalation? How are they different from each other?
Advertisements
उत्तर
The physical process, by which the air containing oxygen is drawn into the lungs and air containing carbon dioxide is forced out from the lungs are called breathing. Breathing involves two steps, inhalation (inspiration) and exhalation (expiration).
Inhalation (Inspiration)
- Ribs move upwards and outwards.
- The diaphragm is pushed downwards and flattens.
- The volume of the chest cavity increases.
- Lungs expand, air pressure becomes low.
- Atmospheric air at higher pressure rushes into the lungs
Exhalation (Expiration)
- Ribs move downwards and inward.
- The diaphragm moves upwards and becomes dome-shaped.
- The volume of the chest cavity decreases.
- Lung size reduces, air pressure becomes high.
- Air rushes out of lungs as atmospheric air pressure is lower.
APPEARS IN
संबंधित प्रश्न
Given alongside is a diagrammatic sketch of a kind of part in human lungs.
Name the parts numbered 1-4
What are the functions of the following in breathing?
Abdominal muscles
Put a tick (✓) against the most appropriate alternative in the following statement.
In humans, taken in of the air through nostrils into the nasal cavity is called
Describe in brief the function of ribs and diaphragm in breathing.
Differentiate between
Breathing and Respiration.
Name the following:
No breathing.
Give the functions of the following:
Larynx
Give the functions of the following:
Lecithin covering
Intake of oxygen from the air and releasing of carbon-di-oxide from the lungs occur through nostrils is called internal respiration.
Diaphragm forms the ______ of the chest cavity.
