Expand-A-Lung: Low-cost version that has a similar inhalation-exhalation function as the PowerLung, but with a simpler design. Likes: One-piece unit with single resistance-adjuster dial.

Box breathing: Emphasizes equal duration of inhalation, breath retention, and exhalation. (1:1:1 ratio) Cyclic hyperventilation: Emphasizes robust inhalation, short retention, and rapid exhalation.

Inhalation could then be shown on the animation, stopped, then ask the pupils to predict how exhalation would take place. Introduce literacy opportunity by asking pupils to write a short passage ...

Rhonchi can occur during exhalation or exhalation and inhalation, but not inhalation alone. Causes. They happen due to fluid movement and other secretions in the large airways.

Inhalation could then be shown on the animation, stopped, then ask the pupils to predict how exhalation would take place. Introduce literacy opportunity by asking pupils to write a short passage ...