The whole is anteriorly somewhat loosely slung to the skin, so as to allow free play when the animal is extending or retracting its introvert.
In the male the penis can be exposed by retracting the foreskin with the fingers.
The Millenium Stadium, the UK 's only stadium with a retracting roof, has a seating capacity of 74,500 for sports events.
The main undercarriage unit has twin wheels and is fitted with powerful brakes, retracting aft when the aircraft is airborne.
Unlike standard awnings, retracting awnings are less likely to be damaged during a storm (if retracted).
