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Nutrition Part 2 - Contenido educativo

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Subido el 22 de noviembre de 2021 por Cp santodomingo algete

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Hello everyone, and welcome back to part two of our four-part video series on nutrition. 00:00:10
Last time, we talked about the digestive system, and how food goes through our digestive tract 00:00:16
and gives us energy. Today, we'll be exploring how we breathe and what makes our lungs work. 00:00:21
The body needs oxygen to survive, so the respiratory system works to keep our muscles 00:00:28
functioning. Without the respiratory system, we wouldn't be able to move or think at all. 00:00:32
I want us to try something. Put your hand on your chest and on the count of three we're going to 00:00:36
take a deep breath in and let it out. Ready? One, two, three. Inhale and exhale. Did you feel that? 00:00:42
Did your chest rise and fall? Did you breathe in and exhale through your nose and your mouth? 00:00:57
I'm sure you did all of that and even more than you know. Let's take a journey through the 00:01:01
respiratory system with our friend Ms. Frizzle and her students to learn more about how breathing 00:01:06
works and what it does for our bodies. It all begins with the breath. Even though we don't 00:01:10
think about it, breathing is incredibly important to our entire bodies. Our bodies need to absorb 00:01:15
oxygen in order for our muscles to function, which keeps our legs moving, heart pumping, 00:01:20
and brains working. When you breathe through your mouth or nose, air enters your body. 00:01:24
From there, oxygen is transported through the trachea, a long rigid tube which is in your neck 00:01:30
that connects the mouth to two bronchi. Bronchi are two tubes that connect the trachea to the 00:01:35
lungs. The lungs are the largest part of the respiratory system. Imagine them being two big 00:01:41
bags that fill up with air when we inhale and deflate when we exhale. But how do the bags fill 00:01:51
up? With help from the diaphragm. The diaphragm is a dome-shaped muscle underneath the lungs. 00:01:56
When it contracts, it causes air to be pulled into our lungs, and when it relaxes, 00:02:02
It helps us push out waste, or carbon dioxide. 00:02:06
While the diaphragm does its job, the bronchioles are also hard at work. 00:02:11
Bronchioles are small tubes inside the lungs. 00:02:15
Inside these bronchioles are tiny sacs called alveoli, which take the air we breathe and help them pass into the bloodstream. 00:02:18
The bloodstream then carries it all around the body, taking it to muscles that need oxygen. 00:02:25
Our muscles absorb the oxygen and then excrete carbon dioxide. 00:02:34
The alveoli do an exchange. 00:02:38
trading the oxygen for the carbon dioxide which is expelled as a gas when we breathe out. And to 00:02:40
think this all happens as fast as you can breathe. That's why it's important that we make sure we 00:02:54
bring in good air into our bodies which keeps our lungs and the rest of our respiratory system 00:02:58
healthy. Be sure to get outside and get some fresh air daily if you can. I'm sure you already do 00:03:03
without even thinking about it. Way to go! I hope you learned something new today and that you'll 00:03:07
take time out of your day to just breathe. Think about how air works its way through your body. 00:03:13
Get outside and see if you can feel the difference fresh air can truly make. 00:03:18
And that's all for today. Keep an eye out for part three where we'll connect the respiratory 00:03:22
system to the circulatory system. Until next time! 00:03:26
Subido por:
Cp santodomingo algete
Licencia:
Reconocimiento - No comercial - Sin obra derivada
Visualizaciones:
71
Fecha:
22 de noviembre de 2021 - 15:58
Visibilidad:
Público
Centro:
CP INF-PRI SANTO DOMINGO
Duración:
03′ 43″
Relación de aspecto:
1.78:1
Resolución:
1280x720 píxeles
Tamaño:
36.19 MBytes

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