The diaphragm (a sheet of muscle underneath the ribcage) and intercostal muscles (located between your ribs).
The muscles that expand the chest cavity during inspiration are the external intercostal muscles.
The External Intercostal Muscles
The breath you breathe in
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chest muscles
diaphragm
. Diaphragm
What muscle expand the chest cavity by rotating the ribs upward, contributing to inspiration
The Diaphragm
The dome-shaped muscle under the thoracic cavity is the diaphragm. Its function is to contract to increase the volume of the thoracic cavity, thereby decreasing pressure in the lungs and causing inspiration.
diaphragm
The diaphragm.
diaphragm
Smooth muscle.
Diaphragm
Diaphragm
The muscle that separates the abdomen pelvic cavity and the pleural cavity is the diaphragm.
The diaphragm is a convex shaped muscle (convex side within the chest cavity).When the diaphragm muscle contracts it flattens out and drops down out of the chest cavity making more room and creating a vacuum -- air then rushes into the lungs.When the diaphragm relaxes it moves back up into the chest cavity and expels the air on the lungs. During inhalation, the increased volume of the lungs causes the ribcage to expand. Inhalation - Diaphragm CONTRACTS and moves DOWN (to allow more space in the chest cavity for lungs to expand).Exhalation - Diaphragm RELAXES and moves UP (to force air out of the lungs).
The diaphragm, a large dome-shaped muscle, lies just under the lungs. Its upward dome-shape flattens, moving downward and expanding the thoracic cavity, during inspiration. The rib muscles simultaneously contract and pull the rib cage up and outward, further expanding the thoracic cavity. The increased volume of the thoracic cavity causes air to rush into the lungs. Exhalation occurs when the diaphragm and rib muscles relax, reducing the volume of the thoracic cavity. The expansion and contraction of the thoracic cavity occurs between 12 and 20 times each minute in adults.