Before I say anything, look at this:
There’s the scapula with the humerus (bone of the arm) attached to it… what does it look like?
Come on, I’m sure all of you saw this. I’ll be damned if you can’t swing around your scapula as a battle axe.
Anyways, coming back to the scapula, I think we can all appreciate the reason why the scapula is called the shoulder blade. Because
we can swing our scapula to victory it resembles the blade of an axe when put onto our own humerus.
Now that we’ve gotten that very important information (and gif) out of the way, let’s dive into the scapula.
But I have to warn the mobile readers, it may be better to use your mobile browser over your Tumblr app, because there are a lot of pictures here that the app will not display. Sorry about that guys!
Where is the scapula? Given that we know it is the shoulder blade, we know it s somewhere near the shoulder joint.
The scapula, a triangular, flat bone, lies on the posterolateral aspect of the thorax, overlying the 2nd to 7th ribs.
Notice where the scapula overlies in the diagram above - right over the 2nd to 7th vertebrae.
We’ve seen how the scapula looks from the back; what about the front?
So the scapula is located in the posterolateral aspect of the thorax, but notice it is still able to articulate with the humerus.
The answer lies in its superior view:
Notice how the scapula is angled: it is obliquely angled so that the main body is still on the posterolateral aspect, but its most lateral end is located lateral to the thorax, where it can articulate with the humerus.
Structure of the Scapula
The scapula is a triangular, flat bone, as already mentioned above. We can figure out what surfaces, borders and angles it has simply by examining a triangle. Let’s try it: