communicable diseases

1. derived from the B lymphocytes these are cells that manufacture antibodies (6, 5)
4. swelling and redness of tissue caused by infection (12)
5. an organism that carries a pathogen from one host to another (6)
6. hormone like molecules used in cell signalling to stimulate the immune response (9)

2. cells that remain in the blood for a long time, providing long term immunity (1, 6, 5)
3. a large polysaccharide deposit that blocks old phloem sieve tubes (7)
7. proteins that bind to the antigen on a pathogen and then allow phagocytes to bind (8)
8. those that prevent pathogens entering the body (7, 8)
9. a microorganism that causes disease (8)
10. a type of white blood cell that engulfs foreign matter and traps it in a large vacuole (phagosome) which fuses with lysosomes to digest foreign matter (10)

Get Revising