the solar system of your mama
fixed joint
The knee helps your leg flex and extend.
The hamstrings flex the knee and extend the hip.
One set to flex a joint, the other to extend a joint.
A chicken's wing has muscles that control the movement of the elbow joint. These muscles contract and relax to move the wing up and down, allowing for flight and other wing-related activities. The tendons in the wing help transmit the force generated by the muscles to the bones, enabling movement at the elbow joint.
The Biceps flex the elbow The Triceps extend the elbow
Quadriceps contracts to extend the knee joint. Rectus femoris, the part of quadriceps flex the hip joint on the thigh.
There is (mainly, in terms of movement) a ball-and-socket joint in the shoulder; a hinge joint in the elbow; and various joints inside the wrist which work together at different bones.
The joint that allows you to move your heel is the subtalar joint, located between the talus and calcaneus bones in the foot. This joint enables the foot to perform inversion and eversion movements, which are essential for walking and balancing. Additionally, the ankle joint (talocrural joint) also contributes to heel movement by allowing the foot to flex and extend. Together, these joints facilitate various movements of the heel and foot.
The quadriceps femoris group extends the leg at the knee joint. It is responsible for straightening the knee and kicking movements.
The triceps muscles extend (straighten) the arm, while the biceps muscles flex (bend) it at the elbow joint.
in football when your about to kick the ball you have to flex and extend your leg.it allows you to bend and straighten (flexion and extension) the joint, for example, when kicking a ball in football, you bend your leg in preparation and then straighten your leg to kick the ballyour hinge joint is used in foot ball when kicking the ball