materials are more reactive and self heat more readily and in smaller amounts than Category 2 materials. Self-heating substances will be identified with the pictogram shown below. In addition, Section 2 of the Safety Data Sheet (SDS) will include one of the following hazard statements: â¢ H251 Self-heating; may catch fire â¢ H252 Self-heating in large quantities; may catch fire . Fire Hazards Self-heating of a substance or mixture is a process where the gradual reaction of that substance or mixture with oxygen in air generates heat. If the rate of heat production exceeds the rate of
Source: Amelia Shoemark. ' Motile ' (or moving) cilia are found in the lungs, respiratory tract and middle ear. These cilia have a rhythmic waving or beating motion (see right). They work, for instance, to keep the airways clear of mucus and dirt, allowing us to breathe easily and without irritation.They also help propel sperm.hey are primordial. The ciliary apparatus is connected to cell cycle progression and proliferation, and cilia play a vital part in human and animal development and in everyday life. The length of a single cilium is 1-10 micrometres and width is less than 1 micrometre.
Ciliary body: Part of the eye, the ciliary body is a circular structure just behind the iris composed of the ciliary muscle and ciliary processes which attach to the lens. The ciliary processes secrete the aqueous fluid, and the ciliary muscle modifies focus by changing the shape of the lens.