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).
amniotic cavity the closed sac between the embryo and the amnion, containing the amniotic fluid. cranial cavity the space enclosed by the bones of the cranium. glenoid cavity a depression in the lateral angle of the scapula for articulation with the humerus.