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Muscular system

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Muscular system - One of us has more than six hundred muscles. Who do you think it is? - Me, isn’t it obvious? - No, me. I’m a lean mean, muscular machine. - Actually, all three of us have more than six hundred muscles in our bodies. - Oh!. You must be joking. - So, You mean no matter how muscular someone looks in the outside we all have the same muscles in the inside. - Yeah, these muscles keep our bodies working, and let us pick up a backpack, ride a bike or even just smile to a friend. And the muscles that you usually think about as muscles are not the only ones you have - My head is spinning where do these kids get this stuff? - On the internet, where else? - Actually, books and school aren’t bad places to learn this stuff either. People actually have three types of muscles: smooth muscle, cardiac muscle and skeletal muscle. Let me start with smooth muscles. Smooth muscles are also called involuntary, that means they work even if you’re not trying. Oh!, right like this example of involuntary muscle at work, mm…., bowww…, just kidding - Ew! You are so gross, but in this case you happen to be right. When a person throws up, the smooth muscles in the stomach are at work. The muscles push food out of the stomach, up through the oesophagus and out the mouth. I threw up once when I ate bad eggs for breakfast. Agg… no good Right, smooth muscles are found inside the walls of the stomach, intestines and other hollow organs like the bladder. Smooth muscles sits between the walls outer covering and inner lining. Like the meat inside the sandwich. You got it. The smooth muscle layer in the wall helps keep things moving through the organ, like food through your intestines as it’s being digested. I’m glad we have smooth muscles in our bladders; some of them keep us from peeing before we are in the bathroom. Now that you mention it, is there a bathroom nearby? Oh!... Back to the subject. Another kind of muscle that works even if you aren’t trying is cardiac muscle. In other words, your heart! Very good. You must be interested to know the heart muscle is also know as the myocardium. Myo… what? Myocardium, it contracts and relaxes to pump blood to the rest of your body. Alright already! I have smooth muscles, I have cardiac muscles. So, what on these… beautiful muscles? Oh! You mean your skeletal muscles; they’re my favourite ones too. May I continue?. Skeletal muscles are also called voluntary muscles. Unlike involuntary muscles you decide when and how to move this. They don’t move unless you make them move and they’re attached to your bones by tendons. So, all together bones, tendons and muscles make your body powerful, right? Exactly. Power! Now we are talking! I bet you don’t know how muscles get the message to move whenever you want them to Bet you, I do. The voluntary muscles are controlled by a part of the brain known as the cerebral motor cortex and the cerebellum. That’s a mouthful. Yeah! But it’s easy to understand it works like this: when you decide to move, the motor cortex send an electrical signal to the spinal cord and peripheral nerves to the muscles causing them to contract. The cerebellum coordinates the muscle movement ordered by the motor cortex, sensors in the muscles and joints send messages back to the cerebellum and the result is smooth coordinated motion. OK! Ok! Let me tell him what happens inside when I make a muscle, I remember this part from health class. Take it away Muscles move body parts by contracting and then relaxing. But they can’t do it alone. They work in pairs called flexors and extensors. The biceps muscle, a flexor in the front of your upper arm contracts to bend a limb at a joint while the extensor relaxes, and the triceps muscle, an extensor in the back of your upper arm contracts to extend or straighten the elbow. So now you know about your biceps or triceps but there are tons more Ah! And each one is a special little friend. Sure, little friends, for example your deltoids muscles help you move your shoulders. My deltoids are fabulous! Pectoral muscles are found in each side of your upper chest. You think of them as pectorals or pecs. My pecs are fabulous! Your quadriceps are in your thighs - My quads are fabulous! And don’t forget your gluteus maximus, these muscles are… they sit under your…well… a… here we go again…you are so second grade My gluteus maximus, that’s my name, maximus! Oh! Wherever these gluteus maximus muscles are, my gluteus maximus are fabulous! Your gluteus maximus is in your rear end What! My what?. Oh! You’ve have embarrassed Maximus, can we talk about something else? Yeah! Let’s talk about how to make our muscles stronger. Kids don’t need to lift weights, we just need to eat healthy food and play, you know like run around, ride a bike and just have fun. It’s a tough job… but somebody’s gotta do it So, I don’t need to lift all these weights all the time to have a healthy body? No, Maximus, are you ok? Oh! My muscles my aching muscles. Hey, now that you now a lot about muscles, which ones are sore? Your deltoids?, your pectorals, your quadriceps? I think all of them

Video Details

Duration: 7 minutes and 6 seconds
Country: Spain
Language: English
Views: 576
Posted by: mjosferreiro on Apr 7, 2013

Very funny video about our muscular system

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