Respiratory System Functions and Structures

The respiratory system's primary function is to transport air into the lungs, facilitating the exchange of oxygen and carbon dioxide. It is divided into the upper and lower tracts. Air enters through the mouth or nose, passing through the pharynx and larynx, before reaching the trachea. The trachea, supported by cartilage rings, divides into bronchi and further into bronchioles within the lungs. Finally, air reaches the alveoli, where gas exchange occurs.

What is the primary function of the respiratory system?

• To circulate blood

• To transport air into the lungs and facilitate gas exchange

• To filter waste from the body

• To digest food

Through which parts of the body does air enter the upper respiratory tract?

• Mouth or nose

• Eyes

• Ears

• Skin

What is the function of the cilia in the trachea?

• To moisten the air

• To catch dust particles

• To produce sound

• To absorb oxygen

What structure is known as the voice box?

• Pharynx

• Larynx

• Trachea

• Bronchi

Into what do the bronchioles eventually divide?

• Nasal cavity

• Alveolar sacs and alveoli

• Trachea

• Larynx

Where does the gaseous exchange take place in the respiratory system?

• In the nasal cavity

• In the alveoli

• In the bronchi

• In the trachea