By2 Wjec As - The Pork Tapeworm

Front 1

How do they work?

Back 1

- endoparasite
- humans = primary host
- pigs = secondary host
- humans get tapeworms by eating infected undercooked pork
- the pig then becomes infected by ingesting human faeces that contain tapeworm eggs

Front 2

Adaptation - hooks and suckers

Back 2

- on its head to attach to gut wall

Front 3

Adaption - thick cuticle and produces inhibitory substances

Back 3

- on its body surface
- protects it from host's immune responses
- prevent its digestion by the host's enzymes

Front 4

Adaption - long, thin body

Back 4

-large surface area-to-volume ratio for the absorption of pre-digested foods by diffusion and active transport

Front 5

Adaption - hermaphrodite

Back 5

- reproduces sexually by self-fertilisation

Front 6

Adaption - each segment contains both male and female reproductive organs

Back 6

- produces large numbers of embryos

Front 7

Adaption - resistant shell

Back 7

- enables them to survive until they are eaten by a pig