Sponge Anatomy

The big opening at the top of the sponge is called...

• Osculum

• Pore

• Flagella

• Collar cells

The small openings all over a sponge are...

• Collar cells

• Flagella

• Osculum

• ostia

The tails on choanocytes are called

• flagella

• collar cells

• plankton

• detritus

Tags

NGSS.MS-LS1-2

Sponges are ______, meaning they cannot move.

• Sessile

• Locomotive

• Bipedal

• Tetrapodal

The structures labelled A are

• Choanocytes

• Amebocytes

• Epidermis

• Ostia

Tags

NGSS.MS-LS1-1

NGSS.MS-LS1-2

Most sponges are ________________, but some live in freshwater.

• marine

• yellow

• square

• good cooks

Glass-like, pointed structures that make up the "skeleton" of sponges

• choanocytes

• spicules

• mesohyl

• porocytes

base that anchors the sponge to the sea floor

• holdfast

• basal disc

• osculum

• ostia

jelly-like substance that separates the endoderm and ectoderm

• spongin

• spicules

• mesohyl

• choanocytes

Outer cell layer in sponges

• mesohyl

• ectoderm

• endoderm

• spongocoel