Inspiration

Definition

Inspiration in the context of anatomy and physiology is the process of drawing air into the lungs, facilitated by the contraction of the diaphragm and intercostal muscles which expands the thoracic cavity. This action decreases internal lung pressure, allowing air to flow in.

Related terms

Diaphragm:

A dome-shaped muscular partition separating the thorax from the abdominal cavity that plays a major role in breathing by contracting and relaxing.

Intercostal muscles: Muscles located between the ribs that expand and contract the rib cage, aiding in ventilation.

Thoracic cavity: The part of the body enclosed by the ribs, including the lungs and heart, where inspiration takes place