Blood cells penetration
No, there is not. Cells in the bloodstream reach most areas in the body, but there are certain privileged areas which stop cells, drugs and macromolecules from leaving the bloodstream and entering the tissue. These privileged areas are thought to exist in sensitive or important areas for their own protection:


  Immune privilege is thought to be an evolutionary adaptation to protect vital structures from the potentially damaging effects of an inflammatory immune response. (Wikipedia)


The most common example of such an area is the blood-brain barrier, but there other barriers to privileged areas, including the blood–testis barrier, the blood-retinal barrier and the blood-ocular barrier. Cells do not pass from the blood through these barriers, except in disease (Larochelle et al. 2011).



Related reading:

The first chapter of Blood Groups and Red Cell Antigens has a decent high-level overview of different types of blood cells and their roles in the bloodstream and the immune system.

How do immune cells overcome the blood–brain barrier in multiple sclerosis? Larochelle et al. 2011