Thorax Anatomy

skeletal framework of the thorax

• sternum

• rib

• thoracic cavity

• rib cage

Not a function of the thoracic wall

• Protect vital thoracic and abdominal organs (most air or fluid filled) from external forces

• Resist the positive (sub-atmospheric) internal pressures generated by the elastic recoil of the lungs and inspiratory movements.

• Provide attachment for and support the weight of the upper limbs.

• provide the attachments for muscles of the abdomen, neck, back, and respiration.

The body of the sternum articulates with the manubrium at what joint?

• jugular notch

• xiphisternal joint

• manubriosternal joint

• infrasternal joint

The sternal angle corresponds to the level of what anatomical structure

• second costal cartilage

• second ICS

• 2nd thoracic vertebrae

• jugular notch

which of the following is not a true rib?

• 1st rib

• 8th rib

• 2nd rib

• 7th rib

Parts of a typical rib, except

• head

• neck

• tubercle

• costal ridge

structure that prolong the ribs anteriorly and contribute to the elasticity of the thoracic wall

• intercostal muscles

• costal cartilage

• intercostal spaces

• endothoracic fascia

not a characteristic features of thoracic vertebrae

• bilateral demifacets on vertebral body

• costal facets on transverse processes

• short, superiorly slanting spinous process

• none of the a bove

boundaries of the superior thoracic aperture, except

• vertebra of T1

• 1st pair of ribs

• superior border of manubrium

• clavicles

Not an accessory muscle of respiration

• diaphragm

• serratus anterior

• scalene

• sternocleidomastoid