All the white blood cells are able to move like an amoeba, and can migrate out of blood vessels into the surrounding tissues. Note-it is easy to confuse the different leucocytes in blood smears. To identify them, you need to look for the shape of the nucleus, and compare their size, relative to that of a red blood cell.
peri-. a prefix meaning âabout,â âaroundâ (perimeter; periscope), âenclosing,â âsurroundingâ (pericardium), ânearâ (perigee; perihelion).
n. pl. perÂ·iÂ·carÂ·diÂ·a (-dÄ-É). The membranous sac filled with serous fluid that encloses the heart and the roots of the aorta and other large blood vessels.[New Latin, from Greek. , from. , around the heart : , peri- +. , heart; see kerd-in Indo-European roots .]. perâ²iÂ·carâ²diÂ·al (-dÄ-Él) , perâ²iÂ·carâ²diÂ·acâ² (-dÄ-Äkâ²) adj.erâ¢iâ¢carâ¢diâ¢um. the membranous sac enclosing the heart. perikardion, perikÃ¡rdion. n use of neuter of perikardios perikÃ¡rdios surrounding = the-heart - + -peri, peri. kardios adj derivative of; kardia-kardÃ­a ]. (heartâ²compare-cardiumâ²pÄr-Ä­). kaer kÃ¤r dÄ Ém