This hair is called âlanugo.â. Hereâs what you should know about your newbornâs body and head hair: 1  Lanugo hair is the hair that grows on the body of an unborn baby. Lanugo attempts to insulate the babyâs body because of a lack of fat.  Lanugo begins to grow around three months after conception.
However, what exactly is the difference between âfunctionalâ and ânon functionalâ requirements? Itâs not that complex, and once you understand the difference, the definition will be clear. The official definition of âa functional requirementâ is that it essentially specifies something the system should do.
Non-functional requirements cover all the remaining requirements which are not covered by the functional requirements. They specify criteria that judge the operation of a system, rather than specific behaviours, for example: âModified data in a database should be updated for all users accessing it within 2 seconds.â.