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Hello everyone! Today we are going to talk about equinoderms. We are Lorenzo, Alvaro, Elena and Lucia.

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You'd like to watch our video because equinoderms are beautiful and you can learn new things.

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Without head and the body is protected by plantings.

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They have a marine habitat.

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It is composed of the cardiovascular system that transports content.

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Interaction.

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The nature of the stimulus involved is not known.

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The responses of arteriosclerosis, vasomytosis,

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myelitis, anachronism, sclerosis, and mumps.

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Do they have a nervous system?

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Yes, they have.

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They have nerve cells that transmit impulses

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impulses between parts of the organism's body. Echinoderms don't have brain. The embryonic

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development takes place from the movement the zygote is formed and the embryonic comes

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into the existence.

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There are a set of glands which function sometimes with both secret and hormones transacting

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as part of the nervous system they are called neuroendocrine system they have a network of

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nervous consisting of interconnected neurons without a central brain reproduction they have

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the two types of reproduction sexual and asexual the sexual is by fragmentation when you cut a

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thing of a star fix in the thing you have cut they do a new thing

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They are oviparous, which means that they lay eggs.

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Embryonic development takes place from the moment the zygote is formed and the embryo comes into existence,

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to the moment in which an individual is born.

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And this is all, thank you.

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No tenemos que repetir.