Download Means = _______________________ Sea Stars Sea urchins

Means = _______________________
Sea Stars
Sea cucumbers
Sea urchins
Sand dollars
1. Body Structure
A. ___________________ (true coelom w/____________)
B. Similarities to _______________
1. ___________________Embryonic development (mouth develops ____________)*
*(NOTE: all animals covered before echinos. are protostomes i.e. mouth develops first)
2. ______________________
a. thin layer of ______________ on top
b. made of ______________(hard bony plates) & _____________________
c. f(x) = support, ________________
C. Water vascular system
Label : madreporite, ampullae, tube foot, ring canal, stone canal
2.
3.
4.
5.
1.
Series of connected _______ filled with ______
2. Water _______ pattern:
_____________ (water intake) ►____________ ►_____________ ►_______________
►____________ ►____________ & ____________
Level of Organization – _________________
Symmetry
Adults -_____________
(Sea stars mostly______________)
Free swimming Larvae – ________________
Habitat - ________________
Feeding
a. __________________ digestive tract
(most complete so far ……..)
b. Two __________ + pyloric caecum
c. Feeding Patterns
i. ________________– sea stars
ii. _______________– sea cucumbers
iii. ______________– sea urchins
iv._______________– brittle stars
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d. Hydraulic feeding : sea star eats bivalve
o __________ inserted between _________
o Bivalve ______________ muscles tire, it opens
o Sea star everts __________ into ___________
o _____________released to __________ prey
o ______________ absorbs dissolved ___________
o Sea star retracts ____________
★ No _________, ___________, _________, _____________
Mouth & Tube feet = _________ side
Anus & madreporite = _________ side
6. Respiration ★ diffusion across skin gills, + water vascular system
7. Circulatory System - ___________
8. Excretion
__________+ diffusion across _________________
9.
Response
 No________ , no _______________
 Central __________________ around ___________
 Nerve branches in each ___________
10. Locomotion – _____________
Process = ★ water into ________________, pushes tube feet down
★ water out of ampullae pulls ________________
11. Reproduction
 Most ______________
 Fertilization ___________________
 Regeneration –_____________ & part of
____________ disk makes a new sea star
(A problem for__________________ !)
12. Ecological Roles
 _______________
 _______________ – crown of thorns sea star
 ________ – urchin eggs (sushi), sea cucumbers
 _________________ research
– _________________ studies
– __________ studies (sea star eggs are very large)
1.
2.
3.
4.
Class__________________– e.g. ______________ stars
a. Arms are ______________ & sharply set off from____________________
b. Move __________________ (may throw down _____________&_______________)
c. _______________ & __________________
Class ____________________ – e.g. sea urchin, sand dollar, sea biscuit
3. No _______________
4. Cenral “shell” is _________________ = ________________
5. Sharp (or stone) ______________________
Class _________________ e.g. sea cucumbers
a. Elongated ________________________ body
b. Reduced ________________________
c. Tube feet modified into _____________________ for______________,
_______________ traps food, _________________ feeders
Class___________________________ e.g. sea stars
a. Mostly _____________________
b. Eat ______________________________
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