Thorax (compages thoracis) consists of edges connected to the anterior ends of the breastbone (sternum), and rear - with the thoracic vertebrae. The front surface of the chest, breastbone and provided front ends of the ribs, much shorter than the back or side of its surface. The cavity of the chest, bounded from below the diaphragm, contains the vital organs - heart, lungs, major blood vessels and nerves. Also inside the chest (in its upper third, just behind the breastbone) is the thymus gland (thymus).
The spacing between the components of the chest ribs occupy the intercostal muscles. Beams of external and internal intercostal muscles are held in various directions: external intercostal muscles - the lower edge of ribs obliquely downward and forward, and the internal intercostal muscles - from the top edge obliquely upwards and forwards. Between the muscles is a thin layer of loose tissue, which are the intercostal nerves and blood vessels.
Newborns have a chest, visibly choked on the sides and pull forward. With age, in the form of the chest clearly manifested sexual dimorphism: in males it is close to the cone, which expands from the bottom; female breast is not only smaller in size, but also different and the shape (expanding in the middle, narrowed in the upper and lower parts).
a., aa. — arteria, arteriae (artery, the artery)
lig., ligg. — ligamentum, ligamenta (ligament, the ligaments)
m., mm. — musculus, musculi (muscle, the muscle)
n., nn. — nervus, nervi (nerve, the nerve)
r., rr. — ramus, rami (branch)
s. — seu (or)
v., vv. — vena, venae (vienna)