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).
1 Arthroscopic Glenoidplasty: reestablishing the normal radius of curvature of the glenoid so that the humeral head is centered in the glenoid, especially in patients with posterior glenoid wear who are susceptible to posterior glenohumeral subluxation.