Stefan's Story

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1. Which clue would tell Stefan which scapular surface was anterior and which was posterior? What is the name of the shallow, oval socket of the scapula that Stefan placed next to the humerus? The posterior side of the scapula has the spine, the anterior is smooth and has the subscapular fossa. The oval socket is called the Glenoid cavity and is the scapular rotation surface for the humerus. 2. Which bone is Stefan referring to as the collarbone? The clavicle. 3. Which surface markings could Stefan use to distinguish the right humerus from the left? The right and left humerus would have the greater tubercle, lesser tubercle, intertubercular fossa, and radial fossa all on the anterior side. 4. Why would Stefan think that an enlarged right deltoid tuberosity might indicate right-handedness? More attachment points for tendons and ligaments to form, indicating more muscle on that side, which could be an indication of the dominant side. 5. What is the location of the pubic symphysis of the female skeleton in the story? Medial in the center of the pelvis, where the two pubis bones meet. 6. Which adaptation would have would have taken place in the pubic symphysis of the female skeleton during the latter stages of pregnancy in preparation for the birthing process? The hormone relaxin increases the flexibility of the pubic symphysis to ease the delivery of the baby. 7. What clues could Stefan have used to identify the gender of the pelvis? In general, the female pelvis is smaller than that of the male. It also is less curved, less vertical and wider than the male. In the female, the pubic arch has a greater than 90 degree angle, whereas the male is less than 90 degrees. 8. How would Stefan distinguished between the left and the right hip bones? The anterior sides of the hip bones are generally concave. The posterior

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