But, Dr. Bianchi says, she does not yet know for sure that the cells are stem cells - she must isolate them and prove they can turn into any of the body's specialized cells - nor where the cells reside, or how, short of injury, to spur them to action.

The cells, according to the challengers, reside in the bone marrow.

These cells reside in the skin for an extended time and respond to different stimuli, such as ultraviolet (UV) radiation or topical steroids, that cause them to migrate out of the skin.

But what aspect of genetic code itself 'codes for' a specific trait independent of the context - the environment, or the particular region in which that cell resides in the organism?

Stromal cells are connective tissue cells that form the supportive structure in which the functional cells of the tissue reside.

The interior of the eye lacks lymph vessels but is highly vascularized, and many immune cells reside in the uvea, including mostly macrophages, dritic cells, and mast cells.

The neuronal cells that allow for the transfer of PGO waves from the pons to the other parts of the brain reside on the rostral portion of the peribrachial area.

In order for this to happen, only one empty cell can reside in each row and each column, and at least one empty cell must be in each diagonal, for instance:

Proliferative cells (Stem Cells) reside in the crypts of Lieberkühn (epithelial invasions into the underlying connective tissue).