WorksheetsSea Urchin Anatomy
Total questions: 20
Worksheet time: 10mins
Echinodermata means...
stomach foot
spiny skin
segmented body
jointed foot
The spines on an echinoderm are actually...
part of the skin.
made of chitin.
part of the endoskeleton.
part of the water vascular system.
These structures resemble long suction cups, and are part of the water vascular system.
madreporite
radial canals
tube feet
ampullae
This structure is responsible for moving water in and out of the water vascular system.
ampullae
madreporite
ring canal
radial canals
Before entering the ring canal, water must pass through the...
stone canal
radial canals
ampullae
tube feet
This water vascular system structure is centrally located, and acts like the "Grand Central Station" for water being distributed to the arms of an echinoderm.
radial canals
ring canal
madreporite
stone canal
The radial canals are lined with little structures that resemble bulb syringes called...
stone canals
ring canals
madreporites
ampullae
When water pressure is increased in the ampullae, it causes...
death.
an adhesive chemical to be released onto the tube feet.
the arm of the echinoderm to move.
the starfish to get up and walk upright.
Sea urchins are in the same clade as...
sand dollars
sea cucumbers
sea stars
brittle stars
A sea star can eat a bivalve by...
prying open the shell and pulling it out using its tube feet.
swallowing the entire shell with the bivalve inside.
digesting the bivalve by pushing its stomach into its shell.
using its arms to smash the shell on a rock before eating the bivalve inside.
Brittle stars don't have...
arms
a water vascular system
radial canals
tube feet
Brittle stars ALSO don't have...
a complete digestive system.
longer arms than a sea star.
a mouth.
radial canals.
Some sea urchins...
are large enough to eat cruise ships.
can't move.
are flat.
have venomous spines.
Sand dollars and sea urchins both have mouth structures called...
Plato's Closet.
Aristotle's Lantern.
Socrates' Dentures.
Democritus' Facepalm
Sea urchins use their mouth structure to feed on...
whales.
algae.
the kraken.
sand dollars.
Sand dollars use their mouth structure to feed on...
algae.
bivalves.
detritus.
air pods.
Sea cucumbers have an endoskeleton made of microscopic bony plates called...
ossicles.
honeycomb.
tube feet.
guard cells.
As a defense mechanism, a sea cucumber will...
throw itself in vinegar to become a sea pickle.
shoot its intestines out of its mouth.
breathe fire.
turn its tube feet into spikes.
Which of the following lists the correct order in which water travels through the water vascular system?
tube feet, stone canal, madreporite, radial canal, ring canal, ampullae
stone canal, radial canal, ring canal, ampullae, tube feet, madreporite
ring canal, radial canal, ampullae, tube feet, stone canal madreporite
madreporite, stone canal, ring canal, radial canal, ampullae, tube feet
Mr. Acree doesn't like it when...
you complete assignments on time.
you show up to class on time.
you're constantly on your phone.
All of the above
