Sponges do not have a digestive system, circulatory system, or nervous system. They do not have organs. Sponges.

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Presentation transcript:

Sponges do not have a digestive system, circulatory system, or nervous system. They do not have organs. Sponges

Echinoderms are a group of marine invertebrates that includes: Star fish Sea lilies Feather stars Brittle stars Sea cucumbers Sea urchins Echinoderm

There are about 6000 species of echinoderms alive today. 

"Echino" means spiny and "derm" means skin. Echinoderm

Echinoderm Some echinoderms have tube feet. If you ever turn a starfish over you will see hundreds of little tubes on each arm. Those tubes attach to an object, suck in, and attach to help the creature move. Echinoderm

Echinoderm The sea cucumber Starfish tubefeet https://www.youtube.com/watch?v=wXf_YodWw40 Starfish tubefeet https://www.youtube.com/watch?v=yqKvx99d2s8 Echinoderm

Cnidarians are a group of marine invertebrates that includes: Corals Hydras Jellyfish Sea anemones Sea pens Cnidarians

They are a group made up of around 9,000 species. Cnidarians

They live in all ocean and some freshwater environments, however are most abundant and diverse in tropical waters. Cnidarians

Cnidarians

Cnidarians Cnidarians are symmetrical, they all have a central axis. They have no organs, only a mouth and digestive tract. Cnidarians

Molluscs Molluscs are a group of invertebrates that include: Squid Octopi Cuttlefish Snails Slugs Mussels, clams, oysters, and scallops Molluscs

Scientists estimate that there are more than 100,000 species of molluscs today.

Molluscs

This makes them the second largest phylum of animals, having fewer species than only the arthropods. Molluscs

Molluscs

Most mollusc species grow a hard shell for protection, but their shell grows in only one or two pieces; they don't have joints in their skeleton. Molluscs

Molluscs

Molluscs There are three main groups of mollusks: Snails ( Gastropods ) Clams, oysters, and mussels ( Bivalvia ) Squids and Octopi (Cephalopoda ) Molluscs

And then… I got hungry.

Molluscs

Molluscs

Molluscs

Molluscs

Molluscs

Molluscs

Molluscs

Molluscs

Molluscs

Molluscs

Molluscs

Pearls? ­The formation of a pearl begins when a foreign substance slips into the oyster between the mantle and the shell. It's kind of like the oyster getting a splinter. The oyster's natural reaction is to cover up that irritant to protect itself. The man­tle covers the irritant with layers of the same substance that is used to create the shell. This eventually forms a pearl. Molluscs

Arthropods Arthropods are a group of invertebrates that include: Insects Spiders Crabs and lobsters Barnacles Centipedes Arthropods

Approximately 85% of all known animals in the world are part of this group. Arthropods

Arthropods have jointed appendages Arthropods have jointed appendages. The name arthropod means: jointed leg. Arthropods

Inside those joints and exoskeletons are muscles that help the organisms move. Arthropods

And then I got hungry again…

Annelids Annelids are a group of invertebrates that include: Earthworms Ragworms Leeches Annelids

Annelids (segmented worms) are a group of invertebrates that includes about 12,000 species

Segmented worms are bilaterally symmetrical. Annelids

Their body consists of a head region, a tail region and a middle region of numerous repeated segments. Each segment contains a complete set of organs. Annelids

Most segmented worms burrow in terrestrial soils or sediments at the bottom of freshwater or marine waters. Annelids

Invertebrates

Invertebrates

Invertebrates

Invertebrates

Invertebrates

Invertebrates

Diplocardia longa Bioluminescence

Arachnocampa luminosa Bioluminecense

Bioluminescence

Bioluminescence