Transcript Phylum Echinodermata

Opening Assignment
• Login to my website and go to “My Blog” in
the upper right corner.
• Today we will be doing research on
Echinoderms using a blog.
Opening Assignment
• On Thursday you made a blog post and
answered a few questions on our last
phylum in this unit.
1.What type of symmetry do echinoderms
have?
2.What are 3 types of echinoderms?
3.What ocean zone do echinoderms live in?
Phylum Echinodermata
Latin means “spiny skin”
Common Names
Common Organisms
General Characteristics
• Radial Symmetry (based on 5 part body
plan called penta radial)
• Complete digestive system (mouth and
anus)
• Endoskeleton made of calcium carbonate
– Called a test, not a shell
• ONLY live in
marine environments
Anatomy
• No defined head, No left or right sides
• Oral surface and aboral surface
Madreporite
Spines
Mouth
Central
Disk
Arm (or Ray)
Ambulacral
Groove
Tube feet
are located
on the oral
surface in
the
ambulacral
groove
What makes an echinoderm an
echinoderm?
• Water vascular
system
– Series of tubes that
contain water which
control tube feet
– Like a hydraulic
system
– Madreporite- opening
to water vascular
system
What makes an echinoderm an
echinoderm? (continued)
• Tube feet
– Muscular extensions of the water vascular
system
– Have suction cups on the ends
– Used for feeding, attachment and locomotion
What makes an echinoderm an
echinoderm? (continued)
• Pedicellaria
– Pincher like
appendages used for
defense and to keep
larvae from settling on
the echinoderm
Unique defense characteristics
• Pedicellaria: jaw-like structures found along the
body and at end of arms
– Keep larvae from being able to settle on slow moving
animal
• Eviscerate: expel internal organs
– Common in sea cucumbers
– Body regenerate organs
– Animals perform this when stressed or under attack
• Use regenerative capabilities to escape
– Animal “drops” an arm to escape
Echinoderms
• Echinoderms – Shape of Life (13:29)
• https://vimeo.com/37295088
• Jonathon Bird’s Blue World – Sea Stars
(8:29)
• https://www.youtube.com/watch?v=pSo30l
RHaAw
• True facts of the Sea pig 
• https://www.youtube.com/watch?v=_y4Db
ZivHCY
Video time
• Some Deep Sea Echinoderms
• Starfish Eating
Opening Assignment
• List 2 adaptations that echinoderms have
that help them survive. Explain how this
feature is used to help the organism.
Today’s Assignment
• We are going to split into groups to research the 5
classes of echinoderms
• Each group will :
– Complete their portion of the “echinoderm jigsaw activity
worksheet”
– Produce 3 Google presentation slides in the shared class
presentation that:
• contains all of the information that is covered on the worksheet
• diagrams of the general body design
• pictures of various animals in the class (video clips, songs, etc.)
• You will have today and half of tomorrow to finish
these slides. Your group will then present these to the
class during the second half of class tomorrow.
– You can use the chromebooks and text books to complete
your research
THIS IS A CONTEST! THE CLASS WITH THE BEST
PRESENTATION WILL WIN A DOUGHNUT PARTY NEXT
THURSDAY!
http://www.surfrider.org/every-drop-counts/
World Water Day
• Sunday is World Water Day! To celebrate
and help conserve water I am asking that
you volunteer to give skip your daily
shower on Sunday. A 10 minute shower
uses approximately 40 gallons of water! If
we can get 100 people to make the pledge
we can save 4,000 gallons of water in just
1 day!
Opening Assignment
(remember to write the question!)
1. Briefly explain the 3 characteristics that
are unique to Phylum Echinodermata.
2. What will a sea cucumber do if
threatened?
3. What surface of the starfish are we
looking at?
Echinoderm Lab
Objectives: In this lab you will observe and
draw preserved echinoderm endoskeletons.
• For every specimen you should identify
and label the oral and aboral surfaces as
well as the lines of symmetry. (The Sea
Star has additional parts that you must
locate, identify and draw.)
Opening Assignment
(remember to write the question!)
1. The side of an echinoderm where the mouth is
located is called the _____________ surface.
2. Where are the tube feet located?
3. What type of symmetry do echinoderms have?
What other phyla that we have studied have
this type of symmetry?
4. The opening to the water vascular system is
called the _________________.
Opening Assignment
(remember to write the question!)
Classes in Phylum Echinodermata: Holothuroidea,
Echinoidea, Ophiuroidea, Asteroidea, Crinoidea
• Correctly match the classes to the common names of
the animals listed. Please write the name of the class
on the line.
________________ Starfish
________________ Sea cucumber
________________ Brittle star
________________ Sea lily
________________ Sea urchin
• List the class that is associated with the following
characteristics:
________________________ Arms meet at central disk
________________________ Evisceration of organs
________________________ Movement by “snake-like” movement of
arms
________________________ Body covered by long spines
________________________ “Flower-like” filter feeder
Opening Assignment
Please use the switch it up strategy!!!
1. What type of symmetry do echinoderms
have?
2. On which surface of a starfish are the
tubefeet located? In what structure are
they found?
3. What type of skeleton do echinoderms
have? What is it called when the animal
is dead?
4. What does echinoderm mean in Latin?