Invertebrates

what is from the from the Greek word “knide”, which means nettle

• organisms

• cnidarians

• Sponges

• symmetry

What is a sponge

• There are over 30 phyla (plural of phylum) of invertebrate animals. In fact, over 95% of the animals on Earth are invertebrates! 

• are animals that are heterotrophic and have tiny holes. After their larva stage, they are sessile, which means they cannot swim/move around. They obtain energy by sweeping water filled with food particles through the body cavity.

• NO backbone!

•  have bioluminescence

Symmetry

• shaped like a vase (like a coral)

• jellylike bodies and long, flexible appendages called tentacles with nematocysts

• are animals that are heterotrophic and have tiny holes (pores). After their larva stage, they are sessile, which means they cannot swim/move around.

• NO backbone!

sponges have

• spicules

• collar cells

• filter feeders

• reaggregate

Cnidarians have ___________.

• people/humans, seaweed, flowers

• dolphins, fish, lobsters.

• jellyfish, anemone, hydra, coral

What is a Cnidarian

• filter feeders.

• NO backbone!

• have jellylike bodies and long, flexible appendages called tentacles with nematocysts, or special stinging cells.

•  animals that are heterotrophic and have tiny holes (pores). After their larva stage, they are sessile, which means they cannot swim/move around.

what is  are animals that are heterotrophic and have tiny holes (pores). After their larva stage, they are sessile, which means they cannot swim/move around. They obtain energy by sweeping water filled with food particles (like plankton and tiny organic particles...yum!) through the body cavity. This means they are filter feeders. _______ use collar cells to help trap the food particles. Some _______ have radial symmetry, but most are asymmetrical. 

• animals

• organisms

• sponges

• symmetry

Tags

NGSS.MS-LS2-3

what has have radial symmetry. They have one of two body shapes, polyp and medusa:

Polyp - shaped like a vase (like a coral)

Medusa - shaped like a bowl (like a jellyfish)

Some _________ have bioluminescence, meaning they are able to produce their own light. This helps organisms that live deeper than the sunlight can reach!

• symmetry

• cnidarians

• organisms

• sponges

what has have jellylike bodies and long, flexible appendages called tentacles with nematocysts, or special stinging cells. These provide protection and are used for stunning or killing prey. Cnidarians eat plankton like dinoflagellates, starfish, sea slugs, turtles, etc.

• symmetry

• Sponges

• cnidarians

• organisms

what also has spicules, needlelike skeletal materials, to give structural support and deter predators from eating them.

• food

• Sponges

• animals

• organisms