What are the features of human primary cells?

Human primary cells are isolated directly from specific human tissues from organs. The cells are isolated under strict laboratory conditions and grown in controlled laboratory conditions. The cells retain the original characteristics of the cells and functions of the tissue they originated from. This makes them especially useful when researchers want their experiments to reflect real human biology more closely. One of their biggest advantages is physiological relevance. Compared with immortalized cell lines, primary cells often provide a more realistic picture of how human cells respond to drugs, chemicals, disease-related changes, or other treatments.