NEUTROPHIL
- Most common type of leukocyte
- Involved with degradation of foreign material through phagocytosis
- Contain multiobed nucleus
- Cytoplasm grainy in appearance due to high number of lysosomes (digestive enzymes)
- Grows around foreign matter, lysosomes help digest foreign body and then it's removed
- Duty to defend using lysosomes to digest
- On a constant patrol, destroying harmful things in the body
MACROPHAGE (monocytes)
- Destroy bacteria through phagocytosis
- Larger in size than neutrophils
- Found in LUNGS and LYMPH NODES (first line of defence)
- Creates hostile environment for bacteria so that it si harder to get ill (causes sore throat etc)
LYMPHOCYTES (B & T)
- B lymphocytes secrete antibodies which destroy bacteria
- T lymphocytes are involved in cell destruction
- Some specialised lymphocytes go into cell to destroy it, others send antibodies out
T lymphocytes : produced in the thymus gland; ensure cell based immunity from infection.
ReplyDeleteB lymphocytes : originate in bone marrow; ensure bodily fluid immunity; activation of B-lymphocytes produces plasma cells, which manufacture and secrete antibodies to fight off specific types of antigens.