Contrast agents in tissue

The tissue has been stained with two dyes; red areas are suffocating, green areas are dying; but there is a lot of the tumour which is healthy.  This sort of picture helps us understand that the tumour is quite a complicated place.

Imaging_microscope_tissuefl2
With fluorescent stains, beautiful and informative pictures are possible.

 

 

 

 

 

 

 

 

 

 

Thank you to Kamila Hussien for the picture.