Our example wants us to match the section of the spine to the type of vertebra found there. Then it wants to fill in the number of vertebrae found in that section and determine if the curve of the spine is concave or convex posteriorly in that region. Alright. So as we look at our image here, we see a spine, we see the curves of the spine, and I can tell that this is a side view of the spine, and it wants us to know anterior and posterior here. So this is the anterior side and this is the posterior side. So if this was in a person, this person would be facing forward in that way. What I can tell is that all these processes are sticking out the back. Those are those bumps that you can feel in your spine as you touch your back. Alright. So here we have our different regions. They're listed in alphabetical order, not in the correct order. So let's go through them and match them up. Alright. Cervical. So which region is your cervical vertebrae? Well, remember, cervical, that refers to your neck region. So the cervical region is going to be at the top here, and that is going to be A. How many bones in your cervical region? Well, we said it was C1 through C7. 7 cervical vertebrae. And now this curvature question, concave or convex posteriorly? Alright. Before I answer that, I just want to remind myself of concave and convex because it always gets me confused. So I always remember this trick that I learned in elementary school. I draw a curve, and I say, alright. Which side looks like you're walking into a cave? Well, that's the concave side, which means that the other side is the convex side. So as I draw the curve on this cervical vertebrae, it's sort of curving that way. So that to me looks like that concave side is facing posterior.

Okay, that brings us to the coccyx. So which letter here is the coccyx? Oh, remember the coccyx? That's your tailbone. So it's down here at E. I actually think not all the bones are there, but we're not going to worry about that. So the coccyx may be E. How many bones make up your coccyx? Well, your coccyx is a single bone, but I'm going to put in parentheses here 3 to 5, or you could just write 4. Remember the coccyx is made of these smaller bones that fuse together in an adult to make that one bone of the tailbone. Alright. Finally, the curvature here. Before we did say the curvature though, I just want to stress and remind you we had 4 major curves of the spine. The coccyx is not one of those major curves of the spine that you need to remember, but we can still see the curve. So I'm going to draw that curve that I see here in. And as I look at that, well, which side is facing posteriorly? Well, that looks like the convex side.

Next up, we have lumbar. So which one is your lumbar vertebrae? Well, remember, lumbar, that's your lower back. So those are those big, heavy vertebrae of the lower back. So as I look here, lumbar is going to be C. How many lumbar vertebrae do you have? Well, see we said lumbar. It was L1 through L5. 5 lumbar vertebrae, and I'll draw in the curve. Alright. That's the curve I see for those vertebrae. So which way is that facing? Well, the posterior side looks like it is concave.

Which brings us to the sacrum. Alright. The sacrum, which letter on here is the sacrum? Remember the sacrum is that bone that's part of the vertebral column, but it connects it to the pelvis. So I can see here that's going to be D. So D, the sacrum. How many bones make up your sacrum? Well, definitely only one bone in the sacrum. But again, I'm going to put in parentheses 5 here because remember the sacrum is made of 5 fused sacral vertebrae. Definitely only one bone in an adult. Alright. Curvature. Well, I'm going to draw in the curve again. Alright. So is the convex or concave side facing posteriorly? Well, to me, that looks like the convex side is.

Lastly, we have the thoracic vertebrae. We have only one letter left, but hopefully you could figure out anyways. Alright. So lastly, we have B here. Remember, thoracic, that refers to sort of the chest region, the area of your rib cage. So thoracic vertebrae are going to be B. How many do you have? Well, just like pairs of ribs, you have 12 thoracic vertebrae, and we can draw in the curve. As I draw in that curve, it looks like the side is facing posteriorly. Now just a quick reminder on the curves, as you go down, these curves should alternate. So it should be, concave, convex, concave, convex. Then remember the coccyx isn't an official curve, and that gives your spine that little bit of a spring action that it has. Okay. So with that, we've named the vertebrae. We've figured out where they are. We've said how many there are, and we've identified the curves. Good work. More problems to follow.