Topic 6: Unikonts III (Invertebrates)

Question 1

Define osculum

Answer 1

open end (of sponge)

Question 2

Define spongocoel

Answer 2

central cavity (of sponge)

Question 3

Define corona

Answer 3

crown of cilia at anterior end

Question 4

Define mantle

Answer 4

thin sheet of tissue covering visceral mass

Question 5

Define visceral mass

Answer 5

main body mass, contains viscera (internal organs)

Question 6

Define foot

Answer 6

structure for locomotion

Question 7

What is a radula? Where do you find them?

Answer 7

a belt of teeth in mouth area that helps scrape up food

found in many mollusks

Question 8

What is ecdysis?

Answer 8

molting-shed external coating during growth