organ

They’ve been found in the blood, organs, and breast milk of humans.

A similar study looked at the thymus – a small organ involved in training the immune system.

This means that cell density is a broadly applicable tool for guiding both engineered and naturally occurring cells to build a vast array of structures, tissues, and organs.

"HGF has numerous important functions in a variety of tissues and organs throughout the body. With further researcher we may be able to find other therapeutic applications of HGF in other pathologies."

The ability to regenerate -- from individual cell types to entire organs or complex tissues -- is of crucial importance for all living species.