Regional anatomy of the Chest

what are the bones of the thorax?

• sternum

• coastal cartilages

• 24 ribs

• 12 thoracic vertebrae

what is the anterior wall of the thorax formed by?

• formed by the sternum, coastal cartilages and anterior ends of the ribs and intercostal muscles

what is the posterior wall of the thorax formed by?

• formed by the thoracic vertebrae, interverterbal discs, posterior parts of the ribs and intercostal muscles

what are the lateral walls formed of?

• the ribs and intercostal muscles

what is the floor of the thorax formed by?

• formed by diaphragm

what is the pleural cavity?

• the space between the lungs and the chest wall, containing a small amount of fluid that lubricates the lungs and allows them to move smoothly during breathing

how many lobes does the right lung have?

• 3 lobes

how many lobes does the left lung have?

2 lobes

what does each lung have structurally speaking?

• an apex, a base, a costal surface and a medial surface with a hilum

without looking at the image labels, label the lung and it’s lobes