Vegetation acts as an interface between the atmosphere and the soil. It increases the permeability of the soil to rainwater, thus decreasing runoff. It shelters the soil from winds, which results in decreased wind erosion, as well as advantageous changes in microclimate.
The shoulder is a ball-and-socket type of joint and is anatomically referred to as the gleno-humeral joint, describing the two bony structures involved. The socket is the glenoid cavity, a cup-shaped piece of bone that juts out from a corner of the shoulder blade (scapula).
The shoulder joint is formed by the articulation of the head of the humerus with the glenoid cavity (or fossa) of the scapula. This gives rise to the alternate name for the shoulder joint â the glenohumeral joint. Type of joint â It is a ball and socket joint. 2  Bony surfaces â Shallow glenoid cavity and large humeral head â there is a 1:4 disproportion in surfaces. 3  A commonly used analogy is the golf ball and tee. 4  Laxity of the joint capsule.