Pages in this set

Page 1

Preview of page 1
Biology and disease Unit 1 summary
Micro organism: a term for a single celled organism that is too small to be seen
without a microscope. (Includes viruses & bacteria) ­ Many of these micro
organisms live in our body and cause us no harm (some are beneficial)

HOWEVER
A Pathogen:…

Page 2

Preview of page 2
The digestive system ­ food & water may carry pathogens into
stomach/intestines via the mouth (cholera & typhoid)

The body has developed some natural defences to prevent entry of
pathogens.

Mucous layer cover gas exchange surfaces, ­ thick/sticky (hard to penetrate).
Production of enzymes that can break down the pathogens.…

Comments

No comments have yet been made

Similar Biology resources:

See all Biology resources »See all resources »