Answer is: <span>patient demographics and social history.
</span>Patient demographics is<span> for the identification of a patient and his categorization into categories for the purpose of statistical analysis.
</span><span>Social history provides background information about the patient, patient's education and employment, family background and other demographic information that can be helpful in treating the patient.</span>
Complex organisms need cells that can perform many different functions. they need to be supported on a cellular level. Without specialized cells you they won't be able to perform different functions.
It is determined by the,
size of Image / size of object
It maintains its structure, and it acts as a stainer.
