Activa JavaScript para disfrutar de los vídeos de la Mediateca.
Poriferans and Cnidarians 1ºA IES PAL 21-22 - Contenido educativo
Ajuste de pantallaEl ajuste de pantalla se aprecia al ver el vídeo en pantalla completa. Elige la presentación que más te guste:
Vídeo de manos sobre Poríferos y Cnidarios (invertebrates project)
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:
- 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