Respiratory System in Humans

Which of the following statement is incorrect about nasopharynx ?

Given below are two statements :

Statement 1 : Only oesophagus open into pharynx.

Statement 2 : Only wind pipe open into pharynx.

In the light of the above statements choose the most appropriate answer from the options given below.

Leaf-like cartilaginous structure present at the anterior portion of oesophagus called

Mark the correct statement from the following.

Cartilaginous rings in respiratory passage is present in

Select the incorrect statement from the following.

The chambers formed dorsally by the vertebral column, ventrally by sternum, laterally by ribs and on the lower side by dome-shaped diaphragm is called

The tracheae, primary, secondary and tertiary bronchi, and initial bronchioles are supported by

Even when air being absent, human trachea does not collapse due to the presence of

_____ is the site of actual diffusion of ${\mathrm{O}}_2$ and ${\mathrm{CO}}_2$

Which of the following is the function of conducting part of the respiratory system?

Site of gaseous exchange in lungs are

The part starting with the external nostrils up to the terminal bronchioles constitute the

Read the following statements.
A. It is double-layered and covers the lungs.
B. Outer layer is in contact with the thoracic wall.
C. Fluid is present between these layers.
D. Inner layer is in contact with the lungs.
The above features refer to:

Epiglottis is made up of

Branching network of bronchi, bronchioles and alveoli forms which of the following organ?

Each terminal bronchiole gives rise to a number of very thin, irregular walled and vascularized bag-like structures called

Nasal chambers open into