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Lab 8

Adaptations for Host Finding

Aquatic habitats

Characteristics

Host Finding Mechanisms

Passive

Active

Use of vectors and intermediate hosts

Terrestrial habitats

Characteristics

Host Finding Mechanisms

Passive

Active

Use of vectors and intermediate hosts

Adaptations for Attachment

"Building blocks"

There are a variety of different components that go into the attachment structures of parasites.

Suckers and loculi

Bothria and bothridia

Spines, hooks, anchors and claws

Clamps

Setae and hairs

Papillae and rugae

Specialized attachment organs

The individual building blocks often occur in various combinations to form organs specialized for attachment.

Sucking disk

Prohaptor

Opisthaptor

Acetabulum

Scolex

Proboscis

Bulla

Hypostome

Putting the package together

Some parasites use a variety of different attachment structures and organs, others use few if any, depending on where they live.

Attaching to external surfaces

Attaching in the gut

Attachment in the bloodstream

Attachment within tissues