Principle of an instrument measuring<unk> .<unk>  vapor is diffusing through the transparently shown cylinder. The yellow arrow symbolizes the diffusion direction. The two dark red square elements are two pairs of sensors each measuring relative humidity and temperature.<unk>  <unk>  or TWL) is the<unk>  of<unk>  that passes from inside a body (animal or plant) through the epidermis (that is, either the epidermal layer of animal skin or the epidermal layer of plants) to the surrounding atmosphere via diffusion and evaporation processes.<unk>  in mammals is also known as insensible<unk> <unk>  (IWL), as it is a process over which organisms have little physiologic control and of which they are usually mostly unaware. Insensible<unk>  of body<unk>  can threaten fluid balance; in humans, substantial dehydration sometimes occurs before a person realizes what is happening. Measurements of<unk>  may be useful for identifying skin damage caused by certain chemicals, physical insult (such as "tape stripping") or pathological conditions such as eczema, as rates of<unk>  increase in proportion to the level of damage. However,<unk>  is also affected by environmental factors such as humidity, temperature, the time of year (season variation) and the moisture content of the skin (hydration level). Therefore, care must be taken when interpreting the meaning of<unk>  rates.
Transepidermal water loss
Conjunctival concretion
Photodisruption
Cutaneous lymphoid hyperplasia
Onychomadesis
Pattern glare
Electrochemical skin conductance
Cutaneous Streptococcus iniae infection