The bones of the shoulder consist of the humerus (the upper arm bone), the scapula (the shoulder blade), and the clavicle (the collar bone). The clavicle is the only bony attachment between the trunk and the upper limb. The familiar flat triangular bone at the back of the shoulder. Known familiarly as the wingbone or, medically, as the scapula. The word "scapula" (with the accent on the first syllable) is Latin.
Explanation:
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If I told too much the answer to your question is <u><em>Scapula </em></u>
If you're apart of K12 public online school and you're doing this lab report you can find the PDF for the common leaves sheet of the 10 leaves in 3.03 Dichotomous Key Investigation: Dichotomous Key under Materials then you just look at the example and instructions and fill out that way