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Hi, we are going to talk about invertebrates, especially worms.

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We are Aya Casou, Jorge Romero, Oneka Perez and Jorge de la Fuente.

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Hi, I am Oneka and I am going to talk about nutrition.

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There are two types of nutrition, parasitic and non-parasitic.

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First we are going to talk about parasitic.

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We have two types of parasitics. Tapeworms and leech. Tapeworms are like this. And leech. Tapeworms, they are in the intestines and they feed from the intestines. And the leech absorbs blood.

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The tapeworm has scoli. Now the non-parasitic. We have a worm and they have rings. They breathe with CO2 and oxygen.

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they can live in water or in mud.

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Interaction.

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The worms help us to fertilize the plants

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and we use them for bite, for fishing fish.

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Also, they create microbial activity and a cycle of neutrogen.

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The worms, when they see a human being, they escape from us because they have a selective presence.

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We are Jorge de la Fuente and Jorge Romero and we are going to talk about reproduction.

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I'm going to talk about sexual reproduction. Sexual reproduction is formed with gametes in this process. In the worms, there are two holes called clitora in which both male and female gametes are produced.

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Two worms get near each other and the two clitoris join, so the both male and female gametes cross and form a cocoon, which is like the egg and looks like a seed. This cocoon will develop into a new individual.

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I am Jorge and I am going to talk about asexual reproduction. Also, they reproduce by budding

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that consists in one big bud that is divided in two. Someone, they reproduce by fragmentation.

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also the earthworms. The fragmentation consists if you cut the earthworm, it degrades too.

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It is also called division.

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This is all. I hope you liked it. Bye.