Cervical cancer cells, coloured scanning electron micrograph (SEM). The cervix is the lower part of the womb, also called the neck of the womb, and comprises part of the woman?™s reproductive system. Cervical cancer is more common in younger women and one of the main causes is a persistent infection of certain types of the human papilloma virus (HPV). The central cell in this image has long extending filopodia like structures. Filopodia contain actin filaments and can have roles in numerous processes including cell-cell interactions, cell migration or as a sensory guide towards a chemoattractant which is a chemical agent that induces a cell to migrate towards it. This may promote tumour growth and the development of metastasis. Magnification: x1100 when printed at 10cm wide.