Structure Fits Function

                Structure fits function

5 types of joint: Condyloid, Saddle joint, hinge joint, ball and socket, hinge joint, pivot joint.

 

The joint are the connecting points between the muscles and the bones. There are 5 different types of general joints. The ball and socket joint is made to almost move on a 360 degree angle. There are a lot of ligaments because of how much movement it can do but since there are so many ligaments a lot of things can go on. The ball and socket joint structure is good because when protecting or blocking yourself human instincts are to cover yourself with your arms using your ball and socket joint. You have to move your arms in many directions so the ball and socket joint is very useful.

 

Hinge joint:

 

You will find this joint in your fingers. This joint only moves one way. It is just like door.It only moves forward. Our human body has adapted to picking up things so now our hands only need to one way, but who know what we would be capable of if we could move our joints backward. Where would your nails be. Our life would be very different if our fingers were more like the ball and socket joint. The animals before were digging so this joint was an advantage. It would make your joints stronger.

 

Condyloid: A good example of the condolid is the wrist bone. The condyloid is what gives the wrist bone flexibility to move in different ways. But it doesn’t get all of the flexibility that the ball and socket gets.

 

Saddle joint: You can find this joint in your thumb. The thumb sits on a kind of bone that sits on another bone. The saddle joint is also what gives your thumb to move in different ways, like how you can touch all your fingers on your hand with only your thumb.

 

Pivot joint: The pivot joint you find in your elbow and that makes you rotate your elbow in different ways.