Folding
An upward fold in a body of rock is called an anticline.
Autotropic & geotropic
An anticline
Extension. Extension increases an angle, as in straightening a joint. During extension, the knee or elbow are straightened.
A syncline is a fold in the crust that bends downward into a valley.
When a wave bends around an obstacle, it is called diffraction.
When a wave bends around an obstacle, it is called diffraction.
Convex when it bends outwards, concave when it bends inwards
flexion
flexion
The bends
That cracking sound is the result of crepitus, which is the result of bone on bone movement or bone on ligament movement.
It is sometimes called the bends
Because they carve the easiest path out of the landscape. THese bends are called meanders. If the bottom of a valley is not straight the river with follow the bottom of the valley instead of going up the sides of the valley. Also it might be to avoid big rocks
REFRACTION
flexion of the knee.
That is called refraction.