Podcast
Questions and Answers
O que é uma tunicina?
O que é uma tunicina?
Quais são as aberturas presentes na túnica dos Urocordados?
Quais são as aberturas presentes na túnica dos Urocordados?
Como os Urocordados se alimentam?
Como os Urocordados se alimentam?
O que é o sistema circulatório dos Urocordados?
O que é o sistema circulatório dos Urocordados?
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Qual é o tipo de reprodução predominante nos Urocordados?
Qual é o tipo de reprodução predominante nos Urocordados?
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O que são os cefalocordados?
O que são os cefalocordados?
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Quais são as características dos cefalocordados?
Quais são as características dos cefalocordados?
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Como os cefalocordados se enterram na areia?
Como os cefalocordados se enterram na areia?
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O que são os cirros bucais?
O que são os cirros bucais?
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O que é uma característica única dos cefalocordados?
O que é uma característica única dos cefalocordados?
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Study Notes
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The Urocordados are a type of marine sesseid animal that can live alone or in colonies. Their size can vary from a few millimeters to 10 centimeters.
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Their representatives are the salpas and ascidias.
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The body of the Urocordados is covered by a thick, named tunic, made of the marine polysaccharide tunicina. This layer also can be called tunicated.
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Two openings exist on the tunic: the inhalant opening, through which water enters the animal's body, and the exhalant opening, through which water returns to the environment.
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The Urocordados feed by filtering water particles that adhere to a mucous secretion produced in a sulcus on the throat, the endolymphatic sac.
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The Urocordados' circulatory system is partially open and the blood flows through large blood vessels, called sinuses, where gas exchanges take place.
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During the larval stage, there is a nerve tube, located dorsally, from which nerves branch to various organs. In the adult stage, this structure reduces to a nerve cord located under the throat, from which the nerves branch.
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The Urocordados reproduce sexually, with the majority of species being monosexual. Some species can reproduce asexually by budding.
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Cefalocordados are a type of fish-like marine animal. They have a flat body with a sharp edge on the lateral side.
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Cefalocordados bury themselves in sand, in a vertical position, and leave their mouth exposed.
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Their anatomy is similar to that of a fish, but they do not have a separate head.
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One distinctive feature of cefalocordados is the presence of cirros bucais, or fishy cirrus filaments, around their mouth.
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Description
Test your knowledge about Urocordados and Cefalocordados with this quiz. Learn about their anatomy, feeding habits, reproduction, and unique features.
