GCSE Biology OCR B J257

B2.2: How do organisms protect themselves against pathogens?

#B2.2.1

describe non-specific defence systems of the human body against pathogens, including examples of physical, chemical and microbial defences

#B2.2.2

explain how platelets are adapted to their function in the blood

#B2.2.3

describe physical plant defences, including leaf cuticle and cell wall

#B2.2.4

explain the role of the immune system of the human body in defence against disease

#B2.2.5

explain how white blood cells are adapted to their functions in the blood, including what they do and how it helps protect against disease

#B2.2.6

describe chemical plant defence responses, including antimicrobial substances

B2.1

What are the causes of disease?

B2.3

How can we prevent the spread of infections?