June 24, 2017

Vertebrates

Vertebrates

Vertebrates are animals with an internal backbone or spinal column. There are over 85,000 species of vertebrate animals such as amphibians, birds, fish, mammals and reptiles. Most large land animals are vertebrates. Even large sea animals, such as the whale, are vertebrates. However, only about 5% … [Read more...]

Invertebrates

Invertebrate

Invertebrates are animals with no internal skeleton or backbone. Invertebrates make up about 95% of all animal species on Earth. Types of invertebrates include annelids, arachnids, cnidaria, crustaceans, echinoderms, insects, mollusks, and protozoa. Exceptions include amphibians, birds, fish, … [Read more...]