Antibodies are the sentries of the immune system, patrolling the body for invaders but leaving the actual killing to other immune cells.
Cells of the innate immune system patrol our organs and tissues in an effort to identify and eliminate threats with a quick but general response, which is similar for many different pathogens.
That's right, the agency assigned to protect America's transportation systems was patrolling the Metrodome.
No. 450 Squadron later operated from several airfields in central and northern Italy, under the "cab rank" system, whereby patrolling fighter-bombers would attack as requested by army air liaison officers.
It has been known for decades that the macrophage is part of the innate immune system, continuously patrolling tissues to differentiate between 'self' and 'non-self' and to deal with any offenders, be it foreign particles, tumour cells, denatured proteins or hostile pathogens.
In the background, security programs, acting like antibodies in a cyber-immune system, patrol the network which connects these servers together, looking for signs of viruses or other infections.
On the other, macrophages and to a much lesser extent other cells of the immune system patrol in the mucus layer.
He had a partner, who picked the lock to a supervisor's office and got hold of the information manual for the microwave-detection system that patrolled a grassy no man's land between the prison and the road.
Cells of the monocyte-macrophage-system constantly patrol the organism, transmigrate trough the blood vessels and into the tissues, where they differentiate into the macrophageal phenotype, a phagocytosing immunoeffector cells, which also presents antigens towards T cells.
Patrolling the systems are police and large naval warships.
