Regional anatomy
Thoraxமார்பு
The chest wall, the lungs and airways, and the heart with its great vessels.
Not shown here. The chambers, valves and conducting system are inside the modelled heart wall and cannot be seen from outside it.
Structures in this region
Read a structure’s notes, then open it selected in the atlas.
Heart
A cone-shaped muscular organ in the middle of the chest, tilted so its apex points down and to the left.
NEET pointsLeft lung
The right lung has three lobes, the left only two, because the heart takes the space.
NEET pointsRight lung
View structureTrachea
A ringed tube in front of the oesophagus, running from the larynx down into the chest.
NEET pointsDiaphragm
A broad domed sheet of muscle separating the chest from the abdomen.
NEET pointsEsophagus
View structureAorta
Leaves the left ventricle and carries oxygenated blood into the systemic circulation.
NEET pointsPulmonary artery
View structureSuperior vena cava
View structureSternum
A flat bone on the front of the chest that the true ribs reach through their cartilage.
NEET pointsRib
12 pairs, each joined behind to a thoracic vertebra. Pairs 1–7 are true or vertebrosternal, joined to the sternum by their own cartilage.
NEET pointsThymus
A lobed structure behind the sternum, large in a child and shrinking with age.
NEET pointsThoracic vertebra
View structureNCERT chapters for this region
Body Fluids and Circulation
The heart in place with the great vessels leaving it, and the arterial and venous trees as separate layers you can show one at a time.
Class 11 · Unit V · Human PhysiologyBreathing and Exchange of Gases
The conducting path from the trachea to the primary bronchi and into both lungs, and the diaphragm below them.
Class 11 · Unit V · Human Physiology