General Characteristics
Sea Cucumbers move by using their tube feet and the ___________ of their body wall
What is muscle
What kind of skeleton do Echinoderms have?
Internal
the side in which the mouth is located is called the .........
What is oral side
Most Echinoderms have a(an) _________ that surrounds their mouth
What is nerve ring
Opening in the vascular system to the outside
What is madreporite
In annelids and mollusks, urine forms in tube-like structures called ______________.
What is Nephridia
The center of the water vascular system is called
What is ring canal
Which type of fertilization occurs when eggs are fertilized outside the female's body?
What is external
A(n) _______________ is an internal skeleton that provides structural support from the inside of the body.
What is endoskeleton
Which of the following refers to a body plan in which body parts repeat around the center of the body?
What is radial
They bury themselves under the sand...
What are sand dollars?
Echinarachnius parma is the scientific name of the common sand dollar. What is the species identifier?
What is parma
Echinoderms have a _____________________ that carries out many essential body functions, including respiration, circulation, and movement.
What is water vascular system
A(n) _______________ is an external skeleton or hard body cover made of chitin.
What is exoskeleton
Which of the following refers to a body plan in which only a single imaginary line can divide the body into two equal halves?
bilateral
These allow the Echinoderm to "walk" and pull open shelled pray.
What are tubed feet?
Which type of circulatory system has blood that is only partially contained in blood vessels? (Hint: Blood may fill vessels, sinuses, or cavities.)
What is open
what is closed
_____________________ is the concentration of sense organs and nerve cells at the front of the body.
What is cephalization