anatomy respiratory what I dont know

Diaphragm

Primary muscle responsible for inspiration; it contracts and flattens to increase thoracic cavity volume.

External Intercostal muscles

Muscles that elevate the ribs and expand the chest during inspiration.

Accessory muscles

Muscles that assist in breathing during labored conditions.

Sternocleidomastoid

Accessory muscle that elevates the sternum during labored breathing.

Scalene muscles

Accessory muscles that lift the first two ribs during inspiration.

Pectoralis minor

Muscle that assists in rib elevation during labored breathing.

Elastin fibers

Fibers that are easily stretched, increasing lung inflation ease and aiding in recoil during expiration.

Lung fibrosis

A condition where elastin fibers are replaced with scar tissue, causing the lungs to become stiff and noncompliant.

Collagen fibers

Fibers that provide strength and structure to lung tissue, resisting stretching.

Balance of elastin and collagen

The combination of elastin and collagen in lung tissue provides flexibility and strength, preventing over-expansion.

Function of collagen in lungs

Prevents lung over-expansion and ensures lungs maintain their shape during exhalation.