1ESO Fish and amphibians - Contenido educativo
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hello to vertebrates group for today so we have fish and we have the amphibians
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okay we have to make two flaps one of them well you have to bring two things
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okay that they give you for another day so have that ready and scissors glue
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pencils everything yeah we are nearly done remember last day we prepare the
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characteristics of vertebrates today we're going to make these two section
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fish and amphibian so you will need to print first this well you should have
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printed before but it's in the same page as the ones that we use for the
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characteristics okay it's in the same page as this one so we need one for the
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fish and this for the amphibians what are we going to do with the fish we're
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gonna make a flap okay this should be here okay so we need to make a normal
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flap that will fit in this space okay that has this size we're going to glue
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the drawing outside okay and inside we have some information that I'm going to
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explain now okay this characteristic you need to write it can you see where my
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fish is okay underneath you have to write these characteristics first of all all fish are aquatic
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they live in aquatic environment it could be either marine or fresh water so if they live
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in the sea and oceans or they live in the in rivers they have fusiform body that is
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a shape that allows them to swim better in the water, and they have fins, okay? Fins on top of
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their body. Their body is covered in scales, okay? All over their body, and they breathe through
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gills. Why gills and not lungs? Because that is good for taking the oxygen from the water.
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And finally, one of the sense organs that is only into this group is the lateral line,
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that is all around the body of the fish and allows them to detect the pressure and movement of the water surrounding them.
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To finish writing the characteristics, underneath you need to write the types, the chondrichtus and osteictis, cartilagous fish and bony fish.
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fish and here you need to print or draw a picture of a cartilagous fish that
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could be a shark a ray and a bony fish that can be any type of fish
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for the amphibians you need to cut this flower okay you cut it and you fold it
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on the part that is dot the dot line you fold it okay see so we have finally this shape so it
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could fit in this space for the amphibians okay and I will explain you the characteristics of
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them now you have the flower and on each of the petal we're going to write different information
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So, what do we need to write? First, how are the amphibians? All of them have four legs, meaning that they are tetrapods. They breathe different if they are in the larval stage or adults. If they are in the larval stage, they breathe through gills. If they are adults, they breathe through lungs and their skin. It's very important that they breathe through their skin.
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So they are very sensitive for example to pesticides because they get attached to their skin
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Metamorphosis from the egg. We have the tadpole and when the tadpole suffers the metamorphosis
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Then becomes the frog or the toad. Okay, all of them suffer metamorphosis to become adults
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We have two different groups
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We have the anura which are the frogs and the toads and they have no tail when they are adults and the urodels
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They are the nudes, that in Spanish we call them gritones, and salamanders, that in Spanish
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we call them salamandras, and they have a tail when they are adults.
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They live inside water most of the time, they can go outside and breathe, but most of the
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time they live in water, that's why maybe you don't know them very well.
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We'll see you next time.
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- Idioma/s:
- Autor/es:
- Marta García
- Subido por:
- Marta G.
- Licencia:
- Reconocimiento - No comercial - Sin obra derivada
- Visualizaciones:
- 63
- Fecha:
- 10 de mayo de 2020 - 14:16
- Visibilidad:
- Clave
- Centro:
- IES FORTUNY
- Duración:
- 05′ 17″
- Relación de aspecto:
- 1.78:1
- Resolución:
- 1280x720 píxeles
- Tamaño:
- 199.48 MBytes
