Blood

Function:-
• Defense against microorganisms.
• When microorganism invades the surrounding tissue,
the neutrophils migrate from the capillaries and
phagocytose it (so called microphages).
• They also secrete proteolytic enzymes.
• During infections, they stimulate the bone marrow to
produce more leucocytes (neutrophilia).
• They attract monocytes to the infected area.
• Precipitate in pus formation.
• They secrete trephone substances, that help in
healing of wounds.
Dr. Amal M. Moustafa, , Department of Histology & Cytology