Cell specialization or cell differentiation as the name indicates, is the process during which cells become specified to perform specific functions instead of generic function.
The first cell that is formed after union of egg and sperm is called as Zygote that is not specified to perform only one function. It has all the genetic data of an organism and can develop into any specific cell with time. Zygote is an specialized cell.
When zygote keeps dividing, after 5 days it becomes a mass or around 300 cells called blastocyst that have two main layers- an outer layer of trophoblast and inner layer of stem cells. These stem cells can be further specialized into any type or cells or an organism.
After a time span of around two weeks, stem cells or inner layer of blastocysts further splits into three layers, ectoderm, mesoderm and endoderm. Now mesoderm is the layer which is later specialized into heart or muscle or bone cells.
Heart cells are the excellent examples of specialized cells that give the heart an ability to pump blood and make our survival possible.
If I recall from my class that it healthy life sytle and may be prevented through immunization I don't remember which but i know its maintain a healthy life style
The perception of employees that a particular member of an organisation possesses a set of skills that are highly specialised or has a greater level of knowledge/expertise owing to their position in the given field is termed as expert power.
The expert power is possessed by acquiring the specialised skill or knowledge that other members of an organisation lack and this can actually give a lot of advantage as a person who possesses expert power is able to influence other people quite easily.
Since Rutland is medical diagnostic equipment specialist she possesses an expert power over the other members and hence, is able to exert a considerable influence over other people to adopt the laser technology for cancer.