What happens in the lungs when the diaphragm and external intercostal muscles relax Quizlet

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What happens in the lungs from the diaphragm and external intercostal muscles relax?
What happens when the diaphragm and the intercostal muscles relax?
What happens in the lungs after the diaphragm relaxes quizlet?
What happens when the external intercostals relax?

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Alveolus drawn as an oval with scalloped edges.

Alveolus wall drawn as a single line (representing 1 cell thick).

Alveolus lumen empty.

Thin layer of surfactant drawn inside alveolus wall.

Alveolar duct ending at alveolus.

Capillary drawn as a tube surrounding outside of the alveolus.

Capillary wall drawn as a single line (representing 1 cell thick).

Capillary lumen narrow.

Red blood cell(s) within capillary lumen.

Arrow to indicate direction of blood flow through the capillary.

Arrow to indicate diffusion of O2 from alveolus lumen into capillary red blood cell.

Arrow to indicate diffusion of CO2 from capillary into alveolar lumen.

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What happens in the lungs from the diaphragm and external intercostal muscles relax?

As the diaphragm and intercostal muscles relax, the lungs and thoracic tissues recoil, and the volume of the lungs decreases. This causes the pressure within the lungs to increase above that of the atmosphere, causing air to leave the lungs.

What happens when the diaphragm and the intercostal muscles relax?

When the internal intercostal muscles contract and diaphragm relax, the ribs move downward and inward and the diaphragm becomes convex {dome shaped), This decreasing the volume of the thoracic cavity and increases the pressure inside as compared to the atmospheric pressure outside.

What happens in the lungs after the diaphragm relaxes quizlet?

What happens when the diaphragm relaxes? Thoracic cavity gets smaller, pressure increases, air is forced out of the lungs.

What happens when the external intercostals relax?

When you exhale: the external intercostal muscles relax and the internal intercostal muscles contract, pulling the ribcage downwards and inwards. the diaphragm relaxes, moving back upwards. lung volume decreases and the air pressure inside increases.