key term - Emigration

Definition

Emigration is the process by which leukocytes move out of the bloodstream and into the tissues to reach sites of infection or injury. This movement involves passing through the blood vessel wall in response to chemical signals at the site of damage or infection.

Related terms

Chemotaxis: The process by which cells move toward higher concentrations of specific chemicals, guiding leukocytes to sites of tissue damage or infection.

Diapedesis: The squeezing of leukocytes between endothelial cells of blood vessel walls during emigration.

Inflammation:

A biological response to harmful stimuli, such as pathogens or damaged cells, often causing redness, heat, swelling, and pain in the affected tissues