Phylum Porifera Vocabulary Practice

What is the term for an organism that does not move and remains attached to one place?

• Sessile

• Spicule

• Amoeboid cell

• Choanocyte

Small, spike-shaped particles of calcium carbonate or silica that give sponges structure are called ____.

• Amoeboid cells

• Spicules

• Pinocytes

• Ostia

Which cells are can move through the mesohyl of the sponge and deliver food to other cells?

• Amoeboid cells

• Choanocytes

• Porocytes

• Flagella

What are the collar cells that line the body cavity and have flagella that circulate water in sponges?

• Choanocytes

• Osculum

• Pinocytes

• Porocytes

A large opening on a sponge through which filtered water is expelled is called ____.

• Osculum

• Ostia

• Mesohyl

• Holdfast

Which cell covers the outer surface of a sponge?

• Pinocyte

• Porocyte

• Ectoderm

• Endoderm

Pores on a sponge through which water is taken in are known as ____.

• A) Ostia

• B) Osculum

• C) Mesohyl

• D) Holdfast

What are the tubular cells that surround the ostia and allow water to flow from the outside of the sponge to its central cavity?

• Porocytes

• Amoeboid cells

• Choanocytes

• Flagella

Whiplike organelle used in sponges for creating a water current is called ____.

• Flagella

• Spicule

• Osculum

• Ostia

The jelly-like matrix found between the endoderm and ectoderm in sponges is called ____.

• Mesohyl

• Holdfast

• Pinocyte

• Porocyte