Vertebrates
Vertebrates can be further classified into classes. The classes are divided according to:
These classes include: Class Mamalia (Mammals) Class Aves (Birds) Class Reptilia (Reptiles) Class Amphibia (Amphibians) Class Pisces (Fish) |
Invertebrates
There are more invertebrates than vertebrates on Earth, as 94% of the species in the world are invertebrates. Invertebrates can have an external skeleton or no skeleton at all. The giant squid is the biggest invertebrate in the world, and it is an invertebrate because it has no backbone. Invertebrate as classified into 6 different groups.
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PORIFERANS
Porifera are sponges, they are a multicellular marine animal. Their bodies are full of channels and pores to let water circulate through them. They are found in water and are attached to rocks.
E.g: Breadcrumb sponge, glass sponge,
Porifera are sponges, they are a multicellular marine animal. Their bodies are full of channels and pores to let water circulate through them. They are found in water and are attached to rocks.
E.g: Breadcrumb sponge, glass sponge,
![Picture](/uploads/2/2/8/9/22890004/896593048.jpg)
MOLLUSCS
Molluscs (plural of Mollusk) have a soft, unsegmented body and make homes in water, or damp areas. There are over 85,000 recognised species of Molluscs.
E.g: Snail, Slug, Octopus, Mussels, Clams, Oysters
Molluscs (plural of Mollusk) have a soft, unsegmented body and make homes in water, or damp areas. There are over 85,000 recognised species of Molluscs.
E.g: Snail, Slug, Octopus, Mussels, Clams, Oysters
![Picture](/uploads/2/2/8/9/22890004/925975670.jpg)
ARTHROPODS
Arthropods have segmented bodies, an exoskeleton, and have jointed appendages. There are over 1,000,000 species of arthropods. Arthropods cannot stretch, therefore their growth is restricted.
E.g: Arachnids, Insects, Crustaceans,
Arthropods have segmented bodies, an exoskeleton, and have jointed appendages. There are over 1,000,000 species of arthropods. Arthropods cannot stretch, therefore their growth is restricted.
E.g: Arachnids, Insects, Crustaceans,
![Picture](/uploads/2/2/8/9/22890004/533895568.jpg)
CNIDARIANS
Cnidarians are a group of animals that live mainly in aquatic regions, but what makes them different from all the other phylum are their cnidocytes, which are specialised cells used mainly for catching prey.
E.g: Jellyfish, Coral, Sea Anemones, Hydra, Polyps
Cnidarians are a group of animals that live mainly in aquatic regions, but what makes them different from all the other phylum are their cnidocytes, which are specialised cells used mainly for catching prey.
E.g: Jellyfish, Coral, Sea Anemones, Hydra, Polyps
![Picture](/uploads/2/2/8/9/22890004/336465758.jpg)
NEMATODES, PLATYHELMINTHES and ANNELIDS
Nematodes are known as round words, they are also parasites, Platyhelminthes are known as flat words, and Annelids are known as segmented worms.
E.g: Worms,
Nematodes are known as round words, they are also parasites, Platyhelminthes are known as flat words, and Annelids are known as segmented worms.
E.g: Worms,
![Picture](/uploads/2/2/8/9/22890004/569509462.jpeg)
ECHINODERMS
Echinoderms are marine animals and can be found at every depth of the ocean. The adults are recognisable by their radial symmetry.
E.g: Starfish, Sea Cucumbers, Sea Urchins, Sand dollars,
Echinoderms are marine animals and can be found at every depth of the ocean. The adults are recognisable by their radial symmetry.
E.g: Starfish, Sea Cucumbers, Sea Urchins, Sand dollars,