Does Chordates Show Metamerism?

Sarah Jenkins
Sarah Jenkins
• • 6 min read

Metamerism Is First Seen in Annelids in Animal Kingdom. Each Segment Usually Contains Appendages, Muscles, Nerves, Blood Vessels, Excretory Organs and a Pair...

Does Chordates Show Metamerism?

Metamerism is first seen in annelids in animal kingdom. Each segment usually contains appendages, muscles, nerves, blood vessels, excretory organs and a pair of coelomic

coelomic
The coelom (or celom) is the main body cavity in most animals and is positioned inside the body to surround and contain the digestive tract and other organs. In some animals, it is lined with mesothelium. In other animals, such as molluscs, it remains undifferentiated.
› wiki › Coelom
sacs which are repeated in almost all segments. It is also seen in kinorhynchs, arthropods and most chordates.

Is metamerism present in chordates?

The term metamerism refers to a linear repetition of parts in an animal body. It occurs in three highly organized phyla : Annelida, Arthropoda and Chordata.

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Which animals does not show metamerism?

  • Metamerism means that the body is externally and internally divided into repetitive segments.
  • Animals included in the phylum Annelida, Arthropoda, and Chordata show true metamerism.
  • Cestoda is a class of Platyhelminthes.
  • Acanthocephala is a phylum of parasitic worms and does not show metamerism.
Sarah Jenkins

Sarah Jenkins

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Sarah Jenkins is a veteran tech journalist with over 12 years of experience covering artificial intelligence, mobile innovations, and digital ethics. Her insights have appeared in leading technology publications worldwide.