The Nematoda possess an elongated and thread-like form.
The body is elongated, and the hair, especially on the tail, short, shiny and close.
The pale glow of the moon shone through the uncurtained window, casting an elongated shadow from the overturned chair.
The coenosarc may consist of a single elongated tube or stolon, forming the stem or axis of the cormus on which, usually, the appendages are arranged in groups termed cormidia; or it may take the form of a compact mass of ramifying, anastomosing tubes, in which case the cormus as a whole has a compact form and cormidia are not distinguishable.
The head is elongated, with a slender muzzle and the mouth-opening small.