Joint scavenger hunt
By: Austin and Nathan 2nd period
A hinge joint is a common class of synovial joint that includes the ankle, elbow, and knee joint. Hinge joints are formed between two or more bones where the bones can only move along one direction to flex or extend.
The hinges to a door, cabinet, etc only allow for it to move in one direction.
On a typical trash can, the lid moves in one direction just like the hinge joint.
On a stapler, when you go to refill the staples, you have to open the stapler. When you open the stapler you see it only moves in one direction, like a hinge joint.
Pivot joints are also a common class of the synovial joints. Pivot joints are freely moveable but it only allows rotational movement around a single axis. For example, the pivot joints provide the twisting movement of the bone of the forearm.
With a locker, there is a lock. When you go to unlock the lock, you have to put in your combination. When you put in your combination, you have to twist and pivot a knob. This twisting is like the pivot for a pivot joint.
It is a little hard to see which item, but the item in this example is the eye at the bottom of the picture. The eye ball is a model is a model of an eyeball. With this model, you are able to spin the model around in a rotation just like the pivot joint.
With each lamp, there is a lightbulb. To put the lightbulb in or take the lightbulb out, you have to twist the lightbulb in a rotational movement, this movement is similar to the rotation of the pivot joint.
Ball and socket joints
The ball and socket joint has a unique structure that allows the most freedom of movement. Within the human body there is only two ball and socket joints. These two are the hip and shoulder. With this joint, the two main components are a bone with a spherical head, and a bone with a cup-like socket.
On the bottom of a chair, there are the feet. The feet has a spherical end that fits into a cup like socket. When trying to move the feet around, you are able to have much freedom of movement.
With the wheels of a wheel chair, the end of the chair is like a sphere, and the wheel is like the cup-like socket. When combined, you are able to move the wheels of the chair freely in almost any direction.
When it comes to fulshing a toilet, there is a lever. The lever has a spherical end that connects into a cup-like socket. When you go to flush the toilet, you are able to push the lever in almost any direction.
The gliding joint, also known as the plane joint is a common joint found in between two bones with flat or nearly flat surfaces. The gliding joints allows for the bones to glide past one another in any directions along the plane. Examples of this joint could be the joints in your ankles and wrists.
On a whiteboard or chalkboard, there are these clips that allow teacher to hold things on the board. The clips are attached to the board, and you are able to slide the clips back in fourth. You can't push the clips back, or pull them forward, you can only move them side to side.
On an art stand, you art able to adjust the stand to your height. To adjust the stand you must slide the holder up or down. When sliding the holder, you can't pull it out or push it in, you can only push it up or down. This is similar to the gliding joint because you can only move it on one plane.
In a display case, the glass on the outside can represent the gliding joint. The glass can only slide left to right, and you cannot push the glass back, or pull the glass out.