Vertebrates are found in the phylum Chordata. The subphylum that vertebrates belong to is called Vertebrata. Chordates are animals that possessed a notochord, a nerve cord, a tail and pharyngeal gill slits at some time during their lives.Know More
The phylum Chordata were found in the Cambrian age about 525 million years ago. This phylum includes lancelets, tunicates, lampreys, sharks, bony fishes, amphibians, reptiles, birds and mammals.
A notochord is a rod that lies along the backs of embryos and some adult chordate species. The hollow nerve cord lies next to the notochord. Many of these chordate features appear only in the embryos of certain species and are lost when the organisms mature.Learn more about Zoology
The primary difference between vertebrates and invertebrates is the presence of a backbone or spinal column, which vertebrates have and invertebrates do not. Examples of vertebrates are humans, dogs, cats and birds. Examples of invertebrates are flatworms, mollusks, sea urchins and insects.Full Answer >
All vertebrates, segmented worms, such as earthworms, and cephalopods, such as squid, have closed circulatory systems. Closed circulatory systems allow larger animals to be much more active than those with open circulatory systems, which are relatively inefficient in delivering oxygen to the organs and muscles.Full Answer >
All species of birds belong to the phylum Chordata. Animals in the Chordata phylum share many traits as embryos; however, these traits can disappear by birth, allowing for great diversity in the phylum.Full Answer >
Paramecia belong to the phylum Protozoa, which falls into the kingdom Protista. Paramecia are considered free-ranging protozoans that are generally very small in size. There are eight species of paramecium, which vary in appearance but share the characteristics of being single-celled organisms that are covered with tiny delicate hairs called cilia.Full Answer >