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Poriferans and Cnidarians 1ºA IES PAL 21-22 - Contenido educativo

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Subido el 28 de marzo de 2022 por Rafael Miguel M.

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Vídeo de manos sobre Poríferos y Cnidarios (invertebrates project)

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Hi guys, today we are going to learn about Peripherals and Synergians with Nico, Amalia 00:00:00
and Paula. 00:00:09
Ok, I know this can be hard, so let's start with a description. 00:00:10
Peripherals are aquatic sea animals that live mainly in the sea. 00:00:15
Their bodies have radial symmetry and they do not have trititious organs. 00:00:21
Some characteristics that we find in Peripera are that their bodies are sag-shaped and that they have an internal skeleton that protects them. 00:00:30
It can be composed of rigid spines called spicules or of flexible fibers called sponges. 00:00:43
Some characteristics that we also can appreciate are, for if they are fed by using a filtration process, 00:00:51
chemisites create a stream of water that travels through their pores. 00:01:07
These bodies take nutrients and oxygen from the water and waste leaves the body through this column. 00:01:14
They perform sexual reproduction by forming cells that join together to produce larvae. 00:01:21
However, they can also perform a sexual reproduction by fragmentation, since they can regenerate 00:01:29
very quickly. 00:01:44
Now, we are going to see the parts of the peripherals. 00:01:46
Porosites have two anocytes with cells that coat the inner cavity, creating a flow bar. 00:01:55
They also filter food. 00:02:04
Porosites are the cells that allow water to flow through the periphery. 00:02:17
There's a funny name, cell-called incubant pores, which are found in the external layer of the sponge. 00:02:21
And lastly, the osculum is within a hole where waste goes out. 00:02:30
Now let's see what cnidarians are. 00:02:43
Cnidarians are aquatic animals that have radial symmetry, and their cells are grouped into simple tissues. 00:02:46
Some cnidarians are organs, and we divide them into two groups. 00:02:56
Cnidarians are sag-shaped, sessile cnidarians. 00:03:03
Some have an internal skeleton consisting of its peepholes, but others have a mineral external skeleton. 00:03:05
They can grow individually or in colonies and form a crop. 00:03:13
Jellyfish are also another type of cinedrions, which are umbrella-shaped cinedrions. 00:03:26
They have a hydrostatic skeleton, meaning they keep inside water by collecting water inside their cells. 00:03:40
During their life, some canarians only take on the form of polyps. 00:03:52
Some adopt the form of the jellyfish and some both. 00:04:00
Let's see some characteristics. 00:04:04
They have a digestive cavity that communicates with the outside through a hole that functions as a mouth and an anus. 00:04:06
Also, tentacles are found around these orifices. 00:04:19
The spinidoblasts are found in tentacles, and these are thin cells with coiled flagellum that can inject a liquid into prey, and this can paralyze the prey. 00:04:24
They are all cannibals. They don't have a respiratory system, nor an excretion system. 00:04:38
Every cell individually carries out gas exchange and the elimination of waste products. 00:04:50
Jellyfish perform sexual reproduction, and polyps reproduced by asexual matters. 00:05:00
And that's all you need to learn from now. 00:05:09
Idioma/s:
en
Autor/es:
Alumnos/as de 1ºA del IES PAL
Subido por:
Rafael Miguel M.
Licencia:
Reconocimiento - No comercial - Sin obra derivada
Visualizaciones:
87
Fecha:
28 de marzo de 2022 - 16:55
Visibilidad:
Público
Enlace Relacionado:
https://padlet.com/rmaroto/invertebrates1A
Centro:
IES PINTOR ANTONIO LOPEZ
Duración:
05′ 57″
Relación de aspecto:
1.78:1
Resolución:
1920x1080 píxeles
Tamaño:
33.79 MBytes

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