Something annular is in the shape of a what?
Annular tropical cyclone within the tropics. However, warmer sea surface temperatures (SSTs) are not required for annular tropical cyclones, with annular characteristics developing only within a narrow range of modest SSTs, ranging from . Annular tropical cyclone An annular tropical cyclone is a tropical cyclone that features a normal to large, symmetric eye surrounded by a thick and uniform ring of intense convection, often having a relative lack of discrete rainbands, and bearing a symmetric appearance in general. As a result, the appearance of an annular tropical cyclone can be referred to as akin to a tire or doughnut. Annular characteristics can be
Annular ligaments of fingers in the deep transverse metacarpal ligament. In the thumb there are two annular pulleys and a single oblique pulley. Together, the A pulleys form a continuous tunnel and, because each A pulley's attachments on the bone is wider than its roof, its shape prevents the pulley from pinching its neighbours at extremes of flexion. The short roof also minimises pressure on the tendon under tension, instead distributing pressure throughout the tunnel. Annular ligaments of fingers In human anatomy, the annular ligaments of the fingers, often referred to as A pulleys, are the annular part of the fibrous sheathes of the