Sponges/Cnidarians

Front

What are nematocysts?

Back

Nematocysts are specialized cells found in cnidarians that contain stinging structures used for capturing prey and defense.

Front

What does 'sessile' mean in relation to sponges?

Back

'Sessile' refers to organisms that are fixed in one place and do not move, such as sponges.

Front

What are pinacocytes?

Back

Pinacocytes are thin, leathery cells that form the outer layer of a sponge.

Front

What type of symmetry do animals with body parts arranged in a circle around a center point exhibit?

Back

Radial symmetry.

Front

What is the function of choanocytes in sponges?

Back

Choanocytes are specialized cells that help in filtering food particles from water and creating water currents in sponges.

Front

What are amoebocytes?

Back

Amoebocytes are mobile cells in sponges that play a role in digestion, nutrient transport, and the production of spicules.

Front

What are spicules?

Back

Spicules are small, needle-like structures found in sponges that provide structural support.

Front

What is the main difference between sponges and cnidarians?

Back

Sponges are simple, porous organisms without true tissues, while cnidarians have true tissues and specialized cells like nematocysts.

Front

What is the body structure of cnidarians?

Back

Cnidarians have a body structure that includes a central cavity (gastrovascular cavity) surrounded by tentacles.

Front

What are the two main body forms of cnidarians?

Back

The two main body forms of cnidarians are the polyp (sessile) and the medusa (free-swimming).