Lab 5 Dissection

Question 1

tube feet

Answer 1

small active tubular projections on the oral face of an echinoderm They are part of the water vascular system. used for movement

Question 2

madreporite

Answer 2

perforated plate by which the entry of seawater into the vascular system of an echinoderm is controlled

Question 3

ocelli

Answer 3

compound eyes with no lens at the tip of their arms. detect movement.

Question 4

Which is bigger: cardiac stomach or pyloric stomach. which one is oral

Answer 4

Cardiac is bigger and is the oral stomach

Question 5

stone canal, ring canal and radial canals

Answer 5

Water comes into the system via the madreporite. It is then circulated from the stone canal to the ring canal and into the radial canals. The radial canals carry water to the ampullae and provide suction to the tube feet.

Question 6

ampullae

Answer 6

store the water that enters the vascular system and send it to the tube feet

Question 7

Ambulacral plates

Answer 7

openings for tube feet

Question 8

Interambulacral plates

Answer 8

tubercules for articulation of spines

Question 9

gonopores

Answer 9

5 of them. release gametes into water

Question 10

aristotle’s lantern

Answer 10

in mouth, 35 teeth and muscles. can project from mouth and cut up food