Answer:
diapedesis
Explanation:
Leukocytes can come out of the bloodstream and the process of their emigration is called diapedesis. In diapedesis, leukocytes roll along the endothelium. These cells stick to and then squeeze between endothelial cells. Specific adhesion molecules assist the leukocytes in sticking to the endothelium. For example, selectins of endothelial cells stick to carbohydrates on the surface of neutrophils. The integrins of neutrophils stick them to the endothelium and assist in diapedesis.
