Phylum Chordata Composed by: Arika Johnson, Gwen Leahy, Savannah Schell, and Jordan Sparks.
Characteristics • Chordates are heterotrophic- they can’t make their own food. • They reproduce sexually instead of asexually. • All Chordates have a notochord (pliable rod like structure). A Chordate’s notochord doesn’t develop into a backbone, but when a Vertebrate is an embryo, theirs does. • Chordates have body segmentation. • All possess an endoskeleton (skeleton inside the body). • They have a complete digestive system. • Subphyla: Tunicata, Cephalochordata, and Vertebrata.
Characteristics • Chordates are complex organisms with specialized cells. • They have bilateral symmetry- meaning they are usually proportioned. • This group of animals lives anywhere from land to sea to air. • Chordates “breath” in O2 and expel CO2. • They have a ventral heart (a chambered heart). • These animals also have a closed blood system (always within vessels). • May have a tail (ex. humans – coccyx). • The possess a nervous system and a brain.
Examples • Reptiles- snake • Amphibians- frog • Mammals- cow • Birds- flamingo • Fish- shark/clown fish
Division Differences • Reptiles are animals that are born on land from eggs and spend the majority of their lives on land. • Amphibians are creatures that are born from eggs with fish-like qualities, but develop into semi-aquatic animals. • Mammals are animals that are born by live birth and are fed their mother’s milk. They can live on land or in water. • Birds are organisms that are born out of eggs, but they are not fed their mother’s milk like mammals. They also possess wings and the majority fly. • Fish are divided into three groups: bony fish, cartilaginous fish, and jawless fish. Bony fish (fin fish) have a skeleton made of bone like in a clown fish. Cartilaginous fish have a skeleton made of cartilage like in sharks and rays. And jawless fish lack jaws like seen in the hagfish. All live in the water.
Fun Facts • 58, 000 species of Chordata • Chordates can be cold or warm blooded. • They have the highest “developed brains” out of all the other phyla. • Chordates can be omnivores as well as herbivores and carnivores.
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