Question

Anatomical dead space is
A) Upper respiratory tract
B) Space between alveoli and capillaries
C) Lower respiratory tract
D) In nasal sacs

Answer 1

It shows the volume of ventilated air (air enters the lungs) that does not take part in gas exchange. Majorly there are two types of dead space namely physiologic dead space and anatomical dead space.

Complete answer:
Anatomic dead space is the complete volume of the moving airways from the nose or mouth down to the degree of the terminal bronchioles.
The volume of anatomic dead space is around 150 ml in people.
All the air that gets gathered in dead space never takes any part in the gaseous exchange; it means oxygen which goes to that bit is not useful for the human body.
All these functions carry on the Upper respiratory tract of the human body.

Additional information: The other type of dead space is a physiologic dead space.
It incorporates all the non-respiratory functional parts of the bronchial tree remembered for anatomic dead space.
Yet in addition factors in alveoli which are very much ventilated but ineffectively perfused.
Less effective at exchanging gas with the blood.

So the correct answer will be option A, i.e., Upper respiratory tract.

Note: According to observation, the anatomic and physiologic dead spaces are generally proportional to healthy people as all parts of the lung are very much perfused. But people with bad health conditions of the lung are inadequately perfused, the physiologic dead space might be extensively bigger than the anatomic dead space. Henceforth, physiologic dead space is more clinically helpful than anatomic dead space.