Fusion of long bones

Below is one of the lecture slides from my lecture (like, duh?)



Okay, do you see a long bone labelled femur?

That's supposedly the longest bone found in our body; around 18 inches (45 cm) in length.

"Long bones fuse at age 21 years old"

And when we grow taller, this bone is the lengthening-bone. There is this thing called the "secondary centres" or the "growing centres" in this bone. In other words, once they're fused; NO MORE GROWING.

I just turned 21, so....

-.-"