FMA22558Muscles
A broad muscle separating the chest and abdomen. When it contracts, it increases chest volume and helps draw air into the lungs.
Contracts inferiorly to increase intrathoracic volume and reduce pressure, drawing air into the lungs during inspiration.
Inferior boundary of the thoracic cavity, forming a dome-shaped partition between the chest and abdomen.
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Muscles pull on skeletal attachments to move bones at joints and hold the skeleton in postural alignment.
Tendons, aponeuroses, and fascial sheaths transmit the contractile force of skeletal muscles onto bones and cartilage.
Contraction of the diaphragm and intercostal muscles changes intrathoracic pressure to draw air into the lungs.