vertebrates 1

vertebrates

Vertebrate animals are more complex than invertebrate animals. All vertebrates belong to the phylum Chordata. They all originate from a common ancestro thta lived over 500 million years ago.

Multiple Choice

All vertebrates originate from a common ancestor.

• True

• False

General characteristics

Vertebrate animals have an internal skeleton with a vertebral column. Their bodies are made up of a head and a torso from which, almost always, four limbs emerge.

Invertebrates groups.

• Fish

• Amphibians

• Reptiles

• Birds

• Mammals

Fish

Fish are ectothermic aquatic vertebrates with a head, torso and tail. Their body is covered with scales, except for the head.

The main types of fish

There ar two different types: Bony fish and cartilaginous fish.

Bony fish

Cartilaginous fish