BIOL2712 Study Guide - Final Guide: Annelid, Rotifer, Polychaete

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25 Jun 2018

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Locomotion and Movement

Why move?

Feeding/resource acquisition

Escape from predation

Avoidance of harmful environmental conditions

Enhanced dispersal

Find a mate (further away to avoid inbreeding)

Jellyfish (cnidarian)

Jet propulsion

Liquids are incompressible

Diploblastic

oi.e. muscle ectodermal or entrodermal cells with elongated contractile bases

anchored in mesogloea

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Flatworms (Platyhelminthes)

Rotifera

Looping locomotion

Contraction of circular muscles  elongation of body

Contraction of longitudinal muscles  bending

Foot  attachment

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