Many coaxial cables also have an insulating outer sheath or jacket. Semi-rigid cable is a coaxial form using a solid copper outer sheath. They are divided into leaf sheath, petiole, and leaf blade. The FC2 female condom is a nitrile sheath or pouch in length. The axon is insulated by a myelin sheath. The cells in suspension enter into the instrument enclosed by an outer sheath fluid. The detachable buttstock was also a machete that came with a canvas sheath. After passing a sheath or tube, the guidewire is withdrawn. These are basal, emerging from the bulb initially-enclosed in a tubular membranous sheath of cataphylls. The leaf base is encased in a colourless sheath. The tail has a tube surrounded by a contractile sheath. Dysmyelination is the abnormal formation of the myelin sheath. This is the provision of an insulating layer, called a myelin sheath. The tendon receives nutrients from the tendon sheath or paratendon. The exterior surface of beaks is composed of a thin, horny sheath of keratin.