For each feature, say which girdle it belongs to, which bone carries it, and what it receives or…
Contributed by StemPy LabTry it on paper first. A hint, the key idea and the worked solution are here when you need them.
For each feature, say which girdle it belongs to, which bone carries it, and what it receives or joins.
- The glenoid cavity.
- The acromion.
- The acetabulum.
- The pubic symphysis.
Need a reminder? The key ideaShow
Each limb has bones. A hand has carpals, metacarpals and phalanges. A foot has tarsals, metatarsals and phalanges. The pectoral girdle has a clavicle and a scapula in each half. The pelvic girdle has two coxal bones. The whole skeleton has bones.
The worked solution
Have you tried it?
Work it out on paper first. It is fine to get stuck or make a mistake: that is how we learn. When you are ready, go through the solution one step at a time, and check each step against your own.
Step 1. (a) Pectoral girdle, in the scapula. It receives the head of the humerus, and together they make the shoulder joint.
Step 2. (b) Pectoral girdle, in the scapula. It is the flat, expanded end of the spine of the scapula, and the clavicle meets it.
Step 3. (c) Pelvic girdle, in the coxal bone. It is the cup where the ilium, the ischium and the pubis fuse, and it receives the head of the femur.
Step 4. (d) Pelvic girdle, where the two coxal bones meet in front. It holds fibrous cartilage.
Answer: (a) scapula, receives the humerus; (b) scapula, meets the clavicle; (c) coxal bone, receives the femur; (d) between the two coxal bones, fibrous cartilage.
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