Saltar navegación

Activa JavaScript para disfrutar de los vídeos de la Mediateca.

Cnidarians - Contenido educativo

Ajuste de pantalla

El ajuste de pantalla se aprecia al ver el vídeo en pantalla completa. Elige la presentación que más te guste:

Subido el 1 de noviembre de 2020 por Andrés G.

83 visualizaciones

Se presentan medusas y pólipos en inglés. Tomado de https://www.youtube.com/watch?v=Dgre5EBQLaM.

Más información Transcripción

Descargar la transcripción

Welcome to MooMooMath and Science. In this video I'd like to talk about the phylum 00:00:00
cnidarians. Cnidarians are invertebrates that are famous for stinging 00:00:05
cells and they have radial symmetry. Let's take a look at probably the most 00:00:12
famous cnidarian, the jellyfish. Cnidarians are famous for their sting. 00:00:18
However, some do have a sting in which they inject venom and others entangle their prey 00:00:52
with sticky hairs or tentacles. 00:00:59
Here's what a harpoon would look like from a cnidarian with a stinging cell. 00:01:03
There are two main types of cnidarians. 00:01:09
The medusa have their tentacles hanging down. 00:01:13
Let's take a look at a medusa in which the tentacles are facing upward. 00:01:17
The sea anemone is the most famous here. 00:01:34
Nadarians move by jet propulsion inside their bell and what happens is that it allows them 00:01:53
to propel themselves forward, not real fast, but it works. 00:02:01
Sea anemones move also. 00:02:07
They move very slowly over the rocks or they may move with a wiggle with their base. 00:02:20
Take a look at this example. 00:02:26
Cnidarians do not have a central nervous system but they do have a very crude nervous system 00:02:40
or a nervous net. 00:02:45
Cnidarians can reproduce both sexually and asexually and with asexual reproduction they 00:02:49
bud or they divide into a new organism. 00:02:57
Here's an example of one life cycle. 00:03:01
There are your cnidarians, the stinging 00:03:05
or sticky animals. They sometimes 00:03:08
run your visit to the beach. Thanks for watching. 00:03:12
MooMooMath uploads a new math or science video every day. 00:03:16
Please subscribe and share. 00:03:19
Idioma/s:
en
Autor/es:
MooMooMath and Science
Subido por:
Andrés G.
Licencia:
Reconocimiento - No comercial - Compartir igual
Visualizaciones:
83
Fecha:
1 de noviembre de 2020 - 10:19
Visibilidad:
Público
Enlace Relacionado:
https://www.youtube.com/watch?v=Dgre5EBQLaM
Centro:
IES AGORA
Duración:
03′ 27″
Relación de aspecto:
1.78:1
Resolución:
1280x720 píxeles
Tamaño:
19.43 MBytes

Del mismo autor…

Ver más del mismo autor

EducaMadrid, Plataforma Educativa de la Comunidad de Madrid

Plataforma Educativa EducaMadrid