Thoracic Muscles and Diaphragm Anatomy

Diaphragm

Pectoralis major = Adduction, medial rotation, and flexion of the humerus at the shoulder joint Subclavius = Pulls clavicle medially to stabilize sternoclavicular joint; depresses tip of shoulder Pectoralis minor = Depresses tip of shoulder; protracts scapula External intercostal muscle = Elevates ribs during inspiration Internal intercostal muscle = Depresses ribs during expiration Transversus thoracis muscle = Depresses ribs Subcostal muscles = Depresses ribs

<p>External intercostal muscle, internal intercostal muscle, innermost intercostal muscle</p> Signup and view all the answers

<p>Intercostal space</p> Signup and view all the answers

<p>Depresses ribs</p> Signup and view all the answers

<p>Depresses ribs</p> Signup and view all the answers

<p>Trachea (C)</p> Signup and view all the answers

<p>True (A)</p> Signup and view all the answers

<p>Innervates the diaphragm</p> Signup and view all the answers

<p>Provide sensory and motor innervation to the intercostal muscles, skin, and pleura</p> Signup and view all the answers

<p>Inferior vena cava</p> Signup and view all the answers

Dome-shaped muscle that separates chest from abdomen; key to breathing.

One of two domes of the diaphragm, located on the right side.

The left half of the diaphragm that aids in breathing.

Opening in the diaphragm allowing the esophagus to pass through.

Opening in the diaphragm for the aorta at vertebral level TXII.

Vein bringing deoxygenated blood from lower body to heart, passes through diaphragm.

Nerves that innervate the diaphragm, allowing movement for breathing.

Large chest muscle responsible for shoulder adduction and flexion.

Muscle stabilizing the clavicle and depressing the shoulder.

Smaller chest muscle aiding in shoulder depression and scapula protraction.

Muscles located between ribs, assisting in inhalation.

Muscles helping in forced exhalation, located deep between ribs.

The deepest intercostal muscles involved in respiratory mechanics.

Nerves that innervate the intercostal muscles.

Artery supplying the intercostal muscles and adjacent structures.

Vein draining blood from the intercostal spaces.

Groove on the inner aspect of a rib for intercostal vessels and nerves.

Movement of the thoracic wall where the sternum rises during inhalation.

Movement where ribs elevate laterally, increasing thoracic cavity volume.

Muscle located on the inner surface of the thoracic wall, aiding in forced exhalation.

Muscles located below the ribs, aiding in respiration.

Opening in the diaphragm for the inferior vena cava, located at vertebral level TVIII.

Point where diaphragm connects to the sternum.

Attachment points of the diaphragm to the vertebrae.

Nerves that innervate the pectoralis major and minor muscles.

Projection of the scapula where pectoralis minor inserts.

Part of the rib that elevates during bucket handle movement.

Membrane covering the lungs; inner pleural layer.

Membrane lining the thoracic cavity; outer layer.

Layer of connective tissue separating the parietal pleura from chest wall.