Functions
Respiratory Cycle
Anatomy
Mechanics of Breathing
Gas Exchange & Transport
100

This is the primary gas supplied by the respiratory system.

What is oxygen?

100

This is the act of moving air into and out of the lungs.

What is pulmonary ventilation?

100

These structures heat, humidify, and filter air.

What is the upper respiratory system?

100

This process brings air into the lungs.

What is inspiration?

100

Gases move from high pressure to this.

What is low pressure?

200

This gas is removed from the body.

What is carbon dioxide?

200

Gas exchange between lungs and blood.

What is external respiration?

200

This is the functional unit of gas exchange.

What are alveoli?

200

This process pushes air out of the lungs.

What is expiration?

200

This law explains partial pressures of gases.

What is Dalton’s Law?

300

This function helps maintain blood pH.

What is acid-base homeostasis?

300

Gas exchange between blood and tissues.

What is internal respiration?

300

These cells perform gas exchange and are very thin.

What are Type I alveolar cells?

300

This law explains pressure-volume relationship.

What is Boyle’s Law?


300

This law explains gas dissolving in liquids.

What is Henry’s Law?

400

This function allows sound production.

What is vocalization?

400

This system transports respiratory gases.

What is the cardiovascular system?

400

These cells produce surfactant.

What are Type II alveolar cells?


400

Pressure and volume have this type of relationship.

What is inverse?


400

This carries ~98.5% of oxygen.

What is hemoglobin?

500

This function relates to smell.

What is olfaction?

500

This process involves bidirectional exchange of gases.

What is internal respiration?

500

These cells remove debris and are part of immune system.

What are macrophages?

500

During inspiration, intrapulmonary pressure does this.

What is decrease?

500

This carries ~70% of CO₂.

What is bicarbonate?

M
e
n
u