alveoli

The sacs in the lungs help in oxygen absorption.

The cavities of the lungs are crucial for breathing.

The pouches in the respiratory system are essential for oxygen intake.

The chambers in the lungs expand when we inhale.

The bubbles in the alveoli represent air during the breathing process.

The air spaces in the lungs aid in respiratory function.

Alveoli act as portals for the exchange of gases.

The orifices in the lungs allow for air passage.

Solid structures do not allow for gas exchange like alveoli do.

Dense materials restrict airflow, unlike alveoli.

Thick barriers can hinder breathing, unlike the thin walls of alveoli.

Opaque objects block light, unlike the transparency of alveoli.

Closed structures do not permit airflow like open alveoli.

Airless spaces cannot support life forms like alveoli can.

Closed cellular structures cannot facilitate gas exchange.

Inaccessible areas within the lungs can impede air flow.

The process of gas exchange happens at the alveoli.

Alveoli play a vital role in lung function.

The respiratory system includes the alveoli.

Oxygen uptake occurs in the alveoli.

Air sacs in the lungs help with breathing.