Answer-
According to the given
question-
- We know that living organism need
energy for their survival and this energy are produced from the
molecules found in the food and break by into water and carbon
dioxide.
- Humans also have the organ system
responsible for eliminating the carbon dioxide from the blood as
well as absorb the oxygen present in the air required for getting
energy.
- The respiratory system is divided
into the upper respiratory system and lower respiratory system and
consists of mouth, nose, and continues up to the lungs.
- In the respiratory system air
enters through mouth and nose and mouth and travel in downward
towards the throat region having pharynx to the larynx or voice
box.
- The larynx has a covering of
epiglottis which is a small flap of tissue and closed when we
swallow food or drink and prevent the entry of these into
airways.
Pathway of air
--> Air enters through oral cavity or nasal cavities or
can say to the nostrils ---> Nasopharynx --->oral pharynx
--->glottis ---> trachea ---> right and left which is part
of primary bronchi---> secondary bronchi ---> tertiary
bronchi---> bronchioles---->cluster of alveoli which is work
as a site for gaseous exchange.