- Marine Invertebrates (Twelve) - The Living Planet
The Living Planet - April 2023
- Worms - The Australian Museum
Worms are invertebrate animals Most types of worms breathe through their skin, but many have gills They can have one or two body openings through which they ingest food and excrete waste Worms can be divided into three main groups - flatworms, segmented worms and roundworms, most of which have a long, soft body with no true legs
- Invertebrates - National Wildlife Federation
Of the invertebrates in the U S , approximately 200 are on the endangered species list An invertebrate is a cold-blooded animal with no backbone Invertebrates can live on land—like insects, spiders, and worms—or in water Marine invertebrates include crustaceans (such as crabs and lobsters), mollusks (such as squids and clams), and coral
- Vertebrates - Vertebrata - the Animal Encyclopedia - ThoughtCo
Vertebrates - Vertebrata - the Animal Encyclopedia - ThoughtCo
- Invertebrates - Fort Pulaski National Monument (U. S. National . . .
They are generally soft-bodied animals that lack an internal skeleton, but often have a hard outer skeleton or shell for body protection Invertebrates make up more than 90% of all living animal species, and serve as food for humans and are key elements in food chains that support birds, fish, and many other vertebrate species
- Porifera (Chapter 3) - An Introduction to the Invertebrates
An Introduction to the Invertebrates - September 2006
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