The wrist can't turn, it can only follow the pronation and supination movements of the forearm, which is performed by the radioulna joints.
The jaws of course! It not only allows us to talk, it also allows us to chew on our food!
The two main functions of joints are for support and movement. Joints allow you to move your body and to support it and hold the bones together.
The femur is almost verticle and strong bone. It can bear the lot of weight. It is slightly convex anteriorly. That gives you added advantage in weight bearing. Convexity on anterior side, enable you to to tolerate the trauma from the front side in better way. There is an angle between the head neck portion and shaft of the femur. That shift the location of the femur away from the hip bone. This arrangement shifts the line of weight transmission towards side way. Then you have the ball and socket type of joint at the hip joint. That allows all types of movement across the joint. You have the knee joint to give you hinge joint. This allows for bending the knee more or less. Together with these features the femur is architectural marvel.
A hinge joint allows bones to only move back and forth a ball and socket joint joint allows your arm to move in all directions.The ball and socket joint can rotate around. The hinge joint can only move up and down. Your ankle is a b&s joint, Your leg is a hinge joint.Ball-socket-joints allow your bones to have circular movement. Your shoulder and your hip have a ball-socket-joints,but the hinge joint lets your bones move backward and forward,the way a door moves. Your elbows,knees and fingers have hinge joints
Allows us to recognize which one is which.
There are many types of joints. One is the ball and socket joint. It allows us to swing our arms in circles. Second is the hinge joint. It is found in our knee. It works like the hinge on a door. It allows our leg to move back and forth in one direction.
Pivot means to turn. A pivot joint turns around a ring. The best example is the ring of bone that the atlas vertebra makes and the "finger" of the dens vertebra. The joint allows us to turn our heads. The atlas holds the head. In mythology Atlas held the world on his shoulders. The dens is called this because it has a "tooth" like structure. (dens as in dental).
its not any joint, its the size of a penis(for females)/ yummyness of the vagina (for males) which causes the head of opposite sex move their head (pleasurably aroused ofcourse).
A pivot joint in use can be illustrated by the movement of the neck. The neck contains several vertebrae that are connected by pivot joints, which allow the neck to rotate and move in different directions. For example, when you turn your head to the left or right, the pivot joints in your neck allow your head to rotate on your shoulders. This is an example of a pivot joint in use.
"new laws allows right turn at red light"
The carpometacarpal joint of the thumb is a saddle joint. It makes the thumb opposable allowing us to manipulate tools and to grip.
(in the US) The traffic regulations of each individual jurisdiction make it impossible to answer this question. You must find out what your state and/or city allows. You may not make a U-Turn in front of a fire station.
The jaws of course! It not only allows us to talk, it also allows us to chew on our food!
Breathing allows us to obtain Oxygen which is necessary for our cells to function and create energy, which in turn allows us to live. Plants on the other hand need to intake carbon dioxide in order to use photosynthesis which allows them to make food and energy to survive. Plants do not breathe. They simply respire by gaseous exchange through diffusion.
The visual system is what allows people to see things with.
The two main functions of joints are for support and movement. Joints allow you to move your body and to support it and hold the bones together.
The femur is almost verticle and strong bone. It can bear the lot of weight. It is slightly convex anteriorly. That gives you added advantage in weight bearing. Convexity on anterior side, enable you to to tolerate the trauma from the front side in better way. There is an angle between the head neck portion and shaft of the femur. That shift the location of the femur away from the hip bone. This arrangement shifts the line of weight transmission towards side way. Then you have the ball and socket type of joint at the hip joint. That allows all types of movement across the joint. You have the knee joint to give you hinge joint. This allows for bending the knee more or less. Together with these features the femur is architectural marvel.