The chitinous layer is usually strengthened by thread like thickenings which, in the region close to the outer opening of the tube, form a network enclosing polygonal areas, but which, through most of the tracheal system, are arranged spirally, the strengthening thread not forming a continuous spiral, but being interrupted after a few turns around the tube.
To turns around a school, as he is credited as having done, heads must ignore many of the governmentâs diktats.
And perfectly indifferent, too, as to whether it turns around or stands still.
And if it goes up and turns around and causes a blockage, here too because of its porosity it causes a malady.
You must let go of the mouse button when Squidward turns around or else you are caught trying to take a peek.
