00:01
First sub -question is gaseous exchange.
00:05
The site of gaseous exchange in the respiratory system is where the mucus is present and most of the gaseous exchange occurs inside the alveoli.
00:16
To facilitate easy diffusion of gases, the alveoli is made up of simple squamous.
00:26
So correct answer for first sub -question is simple.
00:32
Simple squamous epithelium squamous epithelial tissue which allows easy diffusion second sub question is about lung lungs we have two lungs in the body one is the right lung and the other is the left lung both of them have lobes right lung has three lobes and left lung as two lobes they are referred to as superior lobe superior middle yeah middle and inferior lobes respectively in right lobe right lung and left lung has only two they will be referred to as superior and inferior or lower lobe so correct answer for second sub -question is three lobes and two lobes respectively.
01:37
Two lobes.
01:40
Third question is about surfactants that are present in the respiratory tract.
01:48
They are used to reduce the surface tension in the alveoli.
01:54
Surface tension in alveoli.
01:59
If they are absent by any chance so if absent it can lead to surface tension and it will leave to collapsing of anvoli collapsing of anvoli so this surfactant is produced by type 2 type 2 pneumocytes is option d so a decreased decreased production or or loss of surfactant is the resultant of damage to type to pneumocytes.
02:52
Next sub -question.
02:54
So in the tertiary bronchus, tertiary bronchus will divide and form bronchus.
03:04
Bronchioles terminal bronchials.
03:08
So these are the branches of bronchus...