Discuss interrelationships of protochordata
Answers
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Answer:
Protochordates are an informal category of animals (i.e.: not a proper taxonomic group), named mainly for convenience to describe invertebrate animals that are closely related to vertebrates. This group is composed of the Phylum Hemichordata and the Subphyla Urochordata and Cephalochordata.
Explanation:
Lower chordates are the collective name for the Protochordata's members of the animal kingdom. They are only categorized as such for convenience since they do not constitute a "proper" taxonomic group. But they do make up a sizable portion of the Chordata. Because they don't have a real skull, they are also called Acraniata. They fall under the Urochordata and Cephalochordata subphylas.
Protochordata characteristics
- They typically live in marine environments.
- Their body is coelomated, triploblastic, and bilaterally symmetric.
- Their bodies develop a long, rod-like structure for support called the notochord at a certain point in their lives.
- Organ system level organization can be seen in them.
- The notochord, a group of vacuolated turgid cells that resemble a solid, elasticated, and unsheathed rod-like structure, is either present throughout the protochordate's life or only during the early stages of embryonic development.
- Protochordate typically lives in marine environments.
- Protochordates have a single, hollow, and dorsal Central Nervous System, which is entirely different from the CNS of non-Chordata organisms.
- Protochordate bodies are triploblastic and bilaterally symmetrical in accordance with the level of organisation of the organ system.
- A post-anal tail to guarantee that the balance is present in the majority of protochordates.
- Gill slits in the protochordate pharynx allow water to circulate more easily during breathing.
- These organisms have ventral hearts with closed circulatory systems.
Reference Link
- https://brainly.in/question/78657
- https://brainly.in/question/87262