Saltar navegación

Activa JavaScript para disfrutar de los vídeos de la Mediateca.

How do our bones move? - 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 30 de noviembre de 2021 por Gema A.

108 visualizaciones

Más información Transcripción

Descargar la transcripción

Hey there! 00:00:01
I'm sure you know, like Squeaks here does, that exercise is a really important part of 00:00:13
keeping your body healthy and strong. 00:00:17
And whether you're running, a race, playing football, or just doing a whole bunch of jumping 00:00:19
jacks, exercise means moving! 00:00:22
And one SciShow Kids viewer named Autumn wants to know, how does my body move? 00:00:25
Really awesome question, Autumn! 00:00:30
Your body is made up of lots of different parts that all have very special jobs. 00:00:32
To help keep things organized, scientists sometimes group the parts of our bodies into 00:00:36
what we call body systems. 00:00:40
And all of the parts in a certain body system work together to accomplish a goal. 00:00:43
When it comes to making you move, it takes three body systems working together to get 00:00:47
the job done. 00:00:52
They're called the muscular system, the skeletal system, and the nervous system. 00:00:53
Ready to check them out? 00:00:57
Let's start with the muscular system. 00:00:58
Your muscular system is made of, well, muscles. 00:01:00
Muscle is the stuff, what scientists call tissue, that allows you to move around. 00:01:03
Muscles don't just help you to swing a bat or jump to catch a ball. 00:01:08
Some muscles help you chew, wiggle your nose, stick out your tongue, or even blink. 00:01:11
And some muscles, like the ones in your back and legs, just help to hold your body upright 00:01:17
so you can walk, run, or simply sit. 00:01:22
Muscle tissue is pretty flexible, kind of like thick rubber or elastic. 00:01:25
And also like rubber, it can stretch and change shape. 00:01:29
Let's see how. 00:01:32
When you bend your arm at the elbow, a muscle called your bicep contracts, or squeezes, 00:01:33
together. 00:01:38
When it contracts, its shape gets shorter and thicker. 00:01:39
When you straighten your arm, your bicep relaxes. 00:01:42
When a muscle relaxes, its shape gets longer and thinner. 00:01:45
But muscles contracting and relaxing aren't enough to make us move. 00:01:48
They need to be attached to another part of our body to get the job done. 00:01:52
And that's where the next system, the skeletal system, comes in. 00:01:55
The main part of your skeletal system, the skeleton, is made of all your hard, sturdy 00:01:58
bones. 00:02:03
Although we sometimes think of skeletons as dead things, especially around Halloween, 00:02:04
that's actually not true. 00:02:07
Your bones are very much alive, and they have many jobs. 00:02:09
One of the most important jobs is to support or hold up the rest of your body, and this 00:02:12
includes your muscles. 00:02:17
Strong cords called tendons attach your muscles to your bones. 00:02:18
When a muscle contracts or relaxes, it pulls the bone into a different position, which 00:02:22
makes it move. 00:02:26
But how do your muscles know they're supposed to move at all? 00:02:27
Well, they know because they're under control of your nervous system. 00:02:30
The most important part of your nervous system is your brain. 00:02:33
Your brain is kind of like your body's command center. 00:02:37
When you decide to move, your brain sends signals to your muscles, giving them specific 00:02:39
instructions on what to do. 00:02:43
Say you're trying to pick up a snack. 00:02:45
Your brain sends signals to the muscles in your hand and wrist, telling some of them 00:02:46
to contract. 00:02:50
As the muscles contract, they pull the bones in your fingers so that you can grab the apple. 00:02:51
Then your brain sends more signals to your arm muscles, telling them to move the bones 00:02:56
in your arm so that you can bring the apple right to your mouth. 00:03:00
Snack accomplished! 00:03:03
So it takes the actions of three body systems to help us move — the muscular, skeletal, 00:03:05
and nervous systems. 00:03:09
Autumn, thanks for watching SciShow Kids and asking such a great question! 00:03:11
And if anyone else has a question for any of us here at the Fort, let us know by leaving 00:03:15
a comment or emailing us at kids at the sideshow.com. Thanks guys. See you later. 00:03:18
Subido por:
Gema A.
Licencia:
Todos los derechos reservados
Visualizaciones:
108
Fecha:
30 de noviembre de 2021 - 17:15
Visibilidad:
Público
Centro:
CP INF-PRI PIO BAROJA
Duración:
03′ 35″
Relación de aspecto:
1.78:1
Resolución:
1280x720 píxeles
Tamaño:
11.95 MBytes

Del mismo autor…

Ver más del mismo autor

EducaMadrid, Plataforma Educativa de la Comunidad de Madrid

Plataforma Educativa EducaMadrid