Test 6-echinoderms Flashcards
Echino means
Spiny
Dermata means
Skin
They are _____ and ____ symmetrical
Coelomate and radially symmetrical
Body is __ rayed aka ___
5, pentradial
They have a ___ skeleton
Calcareous
They posses a ____ vascular system
Water
Water vascular system is used for diabetes *3
Gas exchange, locomotion and feeding
They have a complete ____ system
Digestive
They have a reduced/open ____ system
Circulatory
They have no ___
Heart
They have a simple radial ____ system
Nervous
They have no ___
Brains
Reproductive system consists of _____ which take up a significant amount of space in the ____
Gonads, body cavity
They reproduce____ mostly on the ____
Sexually, outside
They have cilialated free swimming _____
Larvae
They are abundant on most ____ and____
Sea coasts and rocky shores
Sea stars posses ___ or more arms which radiate from a ____ disk
5, central
Most sea stars posses a simple light ___ at the end of each ___
Light sensitive eyespot
Ray
The starfish ray is the __
Arms
Starfish have ___ different stomachs that perform ____
2, different functions
Starfish consists of a series of canals that eventually end in ___
Tube feet
Starfish tube feet are used for *3
Movement, feeding and bringing in water for gas exchange
Sea urchins posses spikes thus are between ____cm but can be found Up to ____ cm long
1-3cm
20cm
Sea urchins have a ___ shape with no rays or arms
Globoid
Sea urchins have a ____ and ___ on the slime which allows them to move
Ball and socket joints
Sea urchins have a mouth with ___ # _______ teeth
5 calcium carbonate teeth
Sea urchins have a fleshy tongue called the ____ lantern
Aristotles lantern
____are observes in many echinoderms
Spines
____ keep body surface clear of encrusting organism
Pediceariae
Echinoderms also ___ with their natural colour
Camouflage
Name 3 ecological roles of echinoderms
- part of food chain larvae produce food for other creatures
- sea urchins bore into rocks releases nutrients
- sea cucumbers provide habitat for parasites
Spines can be ___ or ___
Soft or hard
