 Okay everybody, Dr. O here and this video I'm going to talk about the functional classification of joints. So we can classify joints both structurally and functionally, I'll cover the two separate. But functional classification has to do with how much movement you can get out of a joint. So joints can be classified as synarthrosis which means an immovable joint and the arthrosis which means slightly movable joint and a diarthrosis which is a synovial joint which means freely movable. So let's look at some examples. So here we have your synarthrosis which again means immovable joint and the examples here are going to be sutures like the bones that hold the bones in your skull together. A gomphosis which is the joint that holds your teeth in their sockets and a synchondrosis which is going to be, the best example is actually going to be your growth plates. There's technically still a joint between the shaft of a long bone and the diaphasis and the ends, the epiphasis until they fuse into adulthood so that's called a synchondrosis. But for now just know that a synarthrosis is an immovable joint. I'll actually go into detail with the joints when we cover them structurally. Then we have the amphiarthrosis here which means slightly movable and the examples you see here is a syndesmosis that's going to be the joint between your radius and ulna almost said tibian fibula for some reason. The joint between your radius and ulna which allows for a bunch of movement as I move my forearm would be an example of a syndesmosis and then the tibian fibula would be an example too but less mobility there. And then the symphysis. So the symphysis is an amphiarthrosis at the interval tuple disc between your spinal vertebrae and also at the symphysis pubis between your two pubic bones but we'll cover that more in the next video. And then here we have the diarthrosis also known as synovial joints. These are going to be joints that actually don't come into contact with each other. They have a joint cavity and that allows for free movement. So a diarthrosis is classified as a freely movable joint and these are all going to be synovial joints. So these are classified by the types of movements that they allow. Sorry, so you'll see that in the next video we'll talk about how these joints are going to be classified. If they're monaxial it means they're freely movable in one plane like the elbow here. If they're biaxial they're freely movable in two planes like my wrist here. I can bend it this way and this way. And if they're triaxial or multi-axial like your shoulder and hip I can move them in all three planes. Alright, so that's going to be the functional classification of joints. Synaarthrosis are immovable, amphiarthrosis are slightly movable and diarthrosis are freely movable or synovial joints. I hope this helps. Have a wonderful day. Be blessed.