People's bodies can be old or young for their chronological age, depending, in part, on the amount and types of stressors ...

The exact role of a tissue in an organism depends on what types of cells it contains. For example, the endothelial tissue that lines the human gastrointestinal tract consists of several cell types.

Depending on the tissue, the tissue renewing stem cells are either multipotent and can produce many types of specialized cells, or unipotent and can differentiate only into one type of cell. During ...

this/ is what could alter things.' Even the most delicate kinds of paper can record the most important details - of family life, national borders or financial transactions. Instability ...