2.1 The Ventilatory System

Front

Not part of the ventilatory system:

Back

Esophagus

Front

Small sacs for gas exchange?

Back

alveoli

Front

O² enters and CO₂ leaves the blood by:

Back

diffusion

Front

Vital capacity:

Back

Max volume of air exhaled after max inhalation.

Front

Tidal volume:

Back

Volume of air inhaled or exhaled in a single breath at rest.

Front

Residual volume:

Back

Volume of air still in lungs after max exhalation.

Front

Vital capacity + residual volume = _____________.

Back

total lung capacity

Front

Gas exchange supplies oxygen to cells and removes carbon dioxide.

Back

oxygen; carbon dioxide

Front

Letter D points to which respiratory muscle?

Back

Diaphragm

Front

Chemoreceptors detect a decrease in pH, indicating increased _______________ concentrations and a need for breathing rate to ________________ .

Back

Carbon dioxide; increase.