Respiratory System Flashcards

Flashcards for Respiratory System Lecture

Inhalation/Inspiration

Breathing in

Exhalation/Expiration

Breathing out

Boyle's Law

The volume of a gas varies inversely with its pressure.

Inhalation

Contracting respiratory muscles increase volume and decrease pressure, causing air to flow into lungs.

Exhalation

Muscles relax, decreasing volume and increasing pressure, causing air to flow out of lungs.

Normal Inspiration

Diaphragm and external intercostal muscles contract, increasing volume and decreasing pressure, leading to air flowing into the lungs.

Normal Expiration

Passive process where inspiratory muscles relax, chest and lungs recoil, decreasing volume and increasing pressure, causing air to flow out of the lungs.

Forced Inspiration

Sternocleidomastoid, scalene, and pectoralis minor muscles raise the sternum and ribs.

Forced Expiration

Internal intercostal and abdominal muscles contract, pulling ribs down and forcing the diaphragm upwards.

Airway Resistance

Resistance to airflow in respiratory passageways.

Surfactant

Decreases surface tension, allowing for easier lung inflation.

Lung Compliance

Effort required to stretch lungs.