heat definition In physics, a form of energy associated with the movement of atoms and molecules in any material. The higher the temperature of a material, the faster the atoms are moving, and hence the greater the amount of energy present as heat.
Cilia (singular: cilium) are microscopic, hair-like structures that extend outwardfrom the surface of manyanimal cells. These structures are important in the cell cycle and replication, and cilia play a vital part in human and animal development and in everyday life. A typical cilium is between one and ten micrometers long, and usually less than one micrometer wide.
Cilia is Hairlike projections in the nose that increase the surface area of a cell, increasing it's ability to trap dust, pollen, and other foreign matter to prevent it from entering the nasal cavity. tiny hairs that trap pathogens. Cilia are very small, hair like organelles.