List the seven key chest landmarks, aling with their location on rhe thorax

>> Clavicles. Course transversely along the superior portion of the chest       wall from the manubrium to the acromion of the scapula and, therefore,      are easily palpable. However, the clavicle, overly rib 1, which makes rib 1 impalpable.

>> Jugular notch of the sternum. Located between the medial ends of the clavicles.

>> Sternal angle (of Louis). Articulation between the manubrium and sternal body. The sternal angle serves as the location for the articulation of rib 2 with the sternum at the T4–T5 vertebral level. The sternal angle is often visible and palpable and serves as an important surface landmark for several underlying structures.

>> Xiphoid process. An inferior pointed projection of the sternal body. The xiphoid process lies at the level of the T9 vertebral body.

>>Costal margins. Formed by costal cartilages 7–10.

The words are exactly from the book as I am studying this as well..7? I only read about 5.

I hope it helped!!