Housing. Many dairy cattle are housed during the winter period, when grass is not growing. Some herds may be housed all year-round (known as âzero-grazingâ).The RSPCA does not support systems housing dairy cattle all year round.Two types of housing system are generally used:ousing. Many dairy cattle are housed during the winter period, when grass is not growing. Some herds may be housed all year-round (known as âzero-grazingâ).
annulus â(plural annuluses or annuli). 1  A ring-or donut-shaped area or structure. ( 2 geometry) The region in a plane between two concentric circles of different radius. ( 3 topology) Any topological space homeomorphic to the region in a plane between two concentric circles of different radius.
Mitral annular calcification (MAC) is a common degenerative process involving the fibrous annulus of the mitral valve.It is generally an incidental finding associated with aging, although it occasionally is prominent enough to cause significant left ventricular inflow obstruction and symptomatic mitral stenosis.itral annular calcification (MAC) is a common degenerative process involving the fibrous annulus of the mitral valve.