WEBVTT 00:00:00.575 --> 00:00:00.639 [applause] Ok, Ok, yea I have to take care of this now 00:00:00.639 --> 00:00:08.226 How are you doing Mr. Marrow, sorry I'm late 00:00:08.226 --> 00:00:10.005 there was a lot going on in the lab. Boy 00:00:10.005 --> 00:00:12.644 Mr. Marrow are you getting enough exercise for 00:00:12.644 --> 00:00:23.969 your muscles? It's like you're all bone. Mr. Marrow? Mr. Marrow? Mr. Marrow? NOOOOOOOOOOOOOOO! 00:00:23.969 --> 00:00:36.302 Bill Nye the Science Guy, Bill Bill Bill Bill Bill Nye the science guy. Science rules! 00:00:36.302 --> 00:00:42.559 Bill Nye the science guy. Ernicia is a property of matter. 00:00:42.559 --> 00:00:51.446 Bill Bill Bill Bill Nye the science guy. T minus 7 seconds 00:00:51.446 --> 00:00:59.099 Bill Nye the science guy. bRought to you by bones without them you wouldn't have a leg to 00:00:59.099 --> 00:01:04.580 stand on. bones and muscles available in fine animals everywhere 00:01:04.580 --> 00:01:07.771 do you realize to work these buttons and open 00:01:07.771 --> 00:01:12.476 this door I need every muscle and bone in my body 00:01:12.476 --> 00:01:14.841 that's because they're all working together 00:01:14.841 --> 00:01:22.181 whether your waving, walking, walking funny 00:01:22.181 --> 00:01:31.055 running, jumping, or flying your muscles and bones work together 00:01:31.055 --> 00:01:34.393 to make you move. see there's a skeleton in 00:01:34.393 --> 00:01:38.226 every one of us. we're all a bunch of bones 00:01:38.226 --> 00:01:41.932 this is our extension arm of science. This 00:01:41.932 --> 00:01:46.203 white pieces are like bones and these thin ropes are like 00:01:46.203 --> 00:01:49.919 muscles. now watch what happens when we make this rope 00:01:49.919 --> 00:01:53.970 this muscle shorter. the arm moves this way 00:01:53.970 --> 00:01:57.186 we make this rope shorter the arm moves that 00:01:57.186 --> 00:02:07.142 way. see hoo, haw hoo haw hoo haw hoo haw hoo haw 00:02:07.142 --> 00:02:11.560 no matter which way pushing or pulling the muscles are getting shorter 00:02:11.560 --> 00:02:16.539 they are contracting. Now we have 200 bones on our body 00:02:16.539 --> 00:02:20.439 most of them are controlled with two sets of muscles 00:02:20.439 --> 00:02:24.753 that's what allows us to move and jump and 00:02:24.753 --> 00:02:30.554 hoo haw. Bones form the framework of our body 00:02:30.554 --> 00:02:36.258 ligaments help hold the bones together muscles move the bones 00:02:36.258 --> 00:02:39.723 tendons anchor the muscles to the bones. 00:02:39.723 --> 00:02:44.875 AHHHCHOO. you have tendons all over your body 00:02:44.875 --> 00:02:47.615 as you can see the tendons in the back of your 00:02:47.615 --> 00:02:50.443 hands. those tendons connect these muscles 00:02:50.443 --> 00:02:56.205 with these bones. Isn't that cool? Oh, I've 00:02:56.205 --> 00:03:02.914 gotta go. Whats the breakfast treat that 00:03:02.914 --> 00:03:06.144 sure to please from your pirital bone to your 00:03:06.144 --> 00:03:13.357 flanges. Bone-os, bone-os. Here's a very 00:03:13.357 --> 00:03:15.886 cool experiment that you can do to prove that 00:03:15.886 --> 00:03:18.338 bones have minerals. Next time you eat 00:03:18.338 --> 00:03:20.719 chicken or turkey save the bones. Take a leg bone 00:03:20.719 --> 00:03:23.411 it's the biggest bone and put it in a bowl of 00:03:23.411 --> 00:03:28.504 vinegar. We're wearing safety goggles becauase 00:03:28.504 --> 00:03:33.892 vinegar is an acid. Leave the bones in for a long 00:03:33.892 --> 00:03:37.388 time after 2 months. The acid dissolves all the 00:03:37.388 --> 00:03:40.640 mineral away from the bone. Without minerals 00:03:40.640 --> 00:03:42.785 the bones get soft and easy to bend. You can 00:03:42.785 --> 00:03:52.602 even tie one in a knot. There. [applause] 00:03:52.602 --> 00:04:01.225 hammering looks simple doesn't it? You just 00:04:01.225 --> 00:04:03.723 move your arm, but watch the hammer needs your 00:04:03.723 --> 00:04:05.679 fingers and they are connected to your wrist 00:04:05.679 --> 00:04:07.472 and that's connect to your lower arm and that's 00:04:07.472 --> 00:04:09.593 connected to your upper arm and that's connected 00:04:09.593 --> 00:04:11.521 to your back and that's connected to your 00:04:11.521 --> 00:04:16.142 leg. Look you even need to move your toes to hammer. To even 00:04:16.142 --> 00:04:18.477 do a simply thing like this you need your whole 00:04:18.477 --> 00:04:22.144 body because your bones and muscles are connected. 00:04:22.144 --> 00:04:33.221 Oh, oh ouch ouch. [ominous music] what is that 00:04:33.221 --> 00:04:41.691 over there what is that thing? Ohhh It's the 00:04:41.691 --> 00:04:46.555 science guy! Scared you huh? See sharks don't have 00:04:46.555 --> 00:04:53.300 any bones they're all cartilage soft and rubbery. You have cartilage too in 00:04:53.300 --> 00:05:01.727 your ribs, your ears, and your nose. See how soft it is and rubbery. 00:05:01.727 --> 00:05:32.373 What? [music] 00:05:32.373 --> 00:05:36.305 Without bones, we couldn't hold ourselves up. 00:05:36.305 --> 00:05:43.891 We'd be floppy, like this pancake. We'd just collapse. 00:05:43.891 --> 00:05:47.979 On the other hand, if we're all stiff rigid bone, like this 00:05:47.979 --> 00:05:51.218 gingerbread guy then we couldn't move at all we need 00:05:51.218 --> 00:05:54.813 muscles and soft movable parts to get around 00:05:54.813 --> 00:06:00.501 muscles move our bones around. That's how it works, whether you're lifting something 00:06:00.501 --> 00:06:05.062 pushing, or jumping up like a spring, ha ha 00:06:05.062 --> 00:06:08.811 muscles and bones help us move around. coming this 00:06:08.811 --> 00:06:15.973 sunday its the muscle pull. smooth striped and caridac 00:06:15.973 --> 00:06:19.942 we've got it all! Muscles, muscles, and more muscles 00:06:19.942 --> 00:06:22.951 extending and contracting and moving like 00:06:22.951 --> 00:06:26.463 you've never seen before! So grab the kids 00:06:26.463 --> 00:06:29.805 grab the dog and grab the neighbors and grab your ace bandage 00:06:29.805 --> 00:06:32.757 and come on down to the anatomy arena! 00:06:32.757 --> 00:06:44.221 muscles move our bodies. without muscles we couldn't ride a bike. 00:06:44.221 --> 00:06:50.009 or play with dogs [Man: Uh, Bill] or do experiments in the lab. 00:06:50.009 --> 00:06:52.973 [Man: Bill] so our muscles help us move 00:06:52.973 --> 00:06:57.016 because they all work together [man: your not fooling anyone Bill.] 00:06:57.016 --> 00:07:00.354 So as i move the muscles in my arm my biceps 00:07:00.354 --> 00:07:05.109 i'm also moving all the other muscles in my body 00:07:05.109 --> 00:07:09.054 because they're all connected 00:07:09.054 --> 00:07:20.802 bones! [man: Bill, uh Bill] Muscles!! 00:07:20.802 --> 00:07:23.357 Those are very fine muscles you have. Of 00:07:23.357 --> 00:07:26.107 course you know these muscles are very important 00:07:26.107 --> 00:07:30.791 they give you the power to move about to do the work in the fields. 00:07:30.791 --> 00:07:33.020 now if we can look inside of you we can see 00:07:33.020 --> 00:07:35.564 the skeleton, the bones of your body. why do you 00:07:35.564 --> 00:07:43.611 have these bones? The best way is to take away the skeleton and see what happens. 00:07:43.611 --> 00:07:49.184 look out! down you go you see you really need that skeleton 00:07:49.184 --> 00:07:51.222 that's the framework that holds your body up. 00:07:51.222 --> 00:07:53.719 Did you know that teeth are the strongest 00:07:53.719 --> 00:07:56.028 bones in the skeleton. There are 3 bones 00:07:56.028 --> 00:08:01.691 in the ear, the hammer, the anvil, the stirrip. There are over 600 separate muscles in the body. 00:08:01.691 --> 00:08:06.448 now you know!! Our bodies are like machines. 00:08:06.448 --> 00:08:09.246 or machines are a lot like our bodies. when 00:08:09.246 --> 00:08:13.388 a mechanism moves they have joints. like this 00:08:13.388 --> 00:08:16.813 door has a hinge. we have hinge joints in 00:08:16.813 --> 00:08:29.907 our fingers and our jaws. Ahhhhhh! 00:08:29.907 --> 00:08:32.451 [skeleton: Hello there Bill] our bones and muscles 00:08:32.451 --> 00:08:35.389 let us move our joints. Please consider the 00:08:35.389 --> 00:08:43.076 following. 00:08:43.076 --> 00:08:46.442 So in our hand, we have hinge joints. Like the 00:08:46.442 --> 00:08:52.084 hinges on a gate. Also in our hands we have a 00:08:52.084 --> 00:08:54.440 special joint called the saddle joint, in our 00:08:54.440 --> 00:08:58.043 thumb. It allows our thumb to go this way 00:08:58.043 --> 00:09:03.753 or this way. 2 directions 1 joint. cool! 00:09:03.753 --> 00:09:08.697 also in our body we'll find ball socket joints 00:09:08.697 --> 00:09:13.499 the kind we see in a tv. Ball and socket joints 00:09:13.499 --> 00:09:17.860 in our body are in our hips. look at our 00:09:17.860 --> 00:09:24.079 hips move in all different ways. 00:09:24.079 --> 00:09:32.520 In our backs, we have swervy joints a whole bunch of them. Our backs slide 00:09:32.520 --> 00:09:35.529 theres in joints in our body that don't move at all. 00:09:35.529 --> 00:09:41.959 fixed joints. There's fixed joints in your skull, but they don't move. all the 00:09:41.959 --> 00:09:44.410 different joints in our body let our bodies move 00:09:44.410 --> 00:09:47.305 all different ways. Thanks for joining me 00:09:47.305 --> 00:10:46.031 I mean joint-ing me on consider the following. 00:10:46.031 --> 00:10:48.759 introducing a collection of music so spine 00:10:48.759 --> 00:10:51.409 tingling it can be brought to you only by 00:10:51.409 --> 00:10:56.779 Deutsch gramabone. Presenting bonely is the night. 00:10:56.779 --> 00:11:04.678 who can forget songs like, Tiba tiba tibula, how i love my tibula. 00:11:04.678 --> 00:11:14.197 my leg bone and me. If I din't have a spine I couldn't stand it. Because I couldn't stand! 00:11:14.197 --> 00:11:17.331 Yo cranium, clavicle, and sternum you've got 00:11:17.331 --> 00:11:22.203 you got over 200 bones why don't you learn them. All these and many many more 00:11:22.203 --> 00:11:26.909 you realize what you're doing, don't you? 00:11:26.909 --> 00:11:29.914 Yea, I'm cracking my knuckles in your face. 00:11:29.914 --> 00:11:32.518 Actually you're pulling your bones apart and letting air 00:11:32.518 --> 00:11:38.611 bubbles between your joints. I am? 00:11:38.611 --> 00:11:41.596 I'm Tim Eng I work for Nike sport research 00:11:41.596 --> 00:11:43.395 lab and we have fun here and try to find 00:11:43.395 --> 00:11:46.424 the science behind the shoes. 00:11:46.424 --> 00:11:48.298 Big part of my job is learning how to distribute 00:11:48.298 --> 00:11:50.766 the pressure beneath the foot to minimize the 00:11:50.766 --> 00:11:55.363 impact and shock up into the bones and muscles 00:11:55.363 --> 00:11:57.361 with the bare foot we can see how much pressure 00:11:57.361 --> 00:11:59.198 is beneath the heel, the ball of the foot and 00:11:59.198 --> 00:12:01.566 the big toe. with a well design shoe we can 00:12:01.566 --> 00:12:03.735 distribute the pressure over the foot so that 00:12:03.735 --> 00:12:05.642 we can absorb some of the shock that goes 00:12:05.642 --> 00:12:09.182 through the bones and muscles of the legs. 00:12:09.182 --> 00:12:10.981 with the shoe we can see the high pressure 00:12:10.981 --> 00:12:13.755 beneath the heel are gone and force of pressure 00:12:13.755 --> 00:12:17.796 is distributed evenly. good shoes fewer 00:12:17.796 --> 00:12:25.111 injuries! 00:12:25.111 --> 00:12:28.658 Bile Nye!!! it's easier to smile than it is 00:12:28.658 --> 00:12:30.672 to frown. That's because you only need 00:12:30.672 --> 00:12:35.352 17 muscles in your face to smile, but it takes 00:12:35.352 --> 00:12:43.700 43 muscles to frown. Ouch! that was my foot! 00:12:43.700 --> 00:12:56.016 You never knoww when you're going to need more energy, less energy to smile! See ya! 00:12:56.016 --> 00:12:59.195 Did you know that...a sparrow has more bones in it's neck 00:12:59.195 --> 00:13:01.943 than a giraffe does. The largest bone ever 00:13:01.943 --> 00:13:05.928 found was the 7 ft long brachiosaurus arm bone. 00:13:05.928 --> 00:13:09.114 Birds have hollow bones, which are light, so they can fly. 00:13:09.114 --> 00:13:11.456 Now you know!! ladies and gentlemen, I 00:13:11.456 --> 00:13:16.530 present the bone. Although bones come in all different shapes and sizes, they 00:13:16.530 --> 00:13:20.200 are basically the same 3 things. On the outside 00:13:20.200 --> 00:13:24.707 is a hard membrane called the periosteum, 00:13:24.707 --> 00:13:30.948 and underneath that is a layer called the compact bone. that's the layer a dog really likes. 00:13:30.948 --> 00:13:34.667 then on the inside the soft cancellous bone 00:13:34.667 --> 00:13:39.090 sometimes called the spongy bone. see dogs 00:13:39.090 --> 00:13:44.199 aren't into sponges, but dogs do like bones 00:13:44.199 --> 00:13:47.934 Bones are apart of you, part of what keeps you 00:13:47.934 --> 00:13:59.380 kicking. and kicking, part of what keeps you 00:13:59.380 --> 00:14:05.845 kicking. Nice job! I got a bone to pick with you. When you're born you have 00:14:05.845 --> 00:14:09.284 about 350 bones. There not all bones, 00:14:09.284 --> 00:14:14.905 there's cartilage, that's what your ear is made of, and your ears. 00:14:14.905 --> 00:14:18.591 anyway cartilage fuses together to make bones 00:14:18.591 --> 00:14:24.431 your skull starts as several different plates and ends up as 1 big bone. 00:14:24.431 --> 00:14:26.807 So by the time your my age you only have 00:14:26.807 --> 00:14:30.019 200 bones. But you started out with 350, isn't 00:14:30.019 --> 00:14:32.375 that wild. hey listen i'm not pulling your 00:14:32.375 --> 00:14:39.641 femur. that's a bone gag. she loves those bones jokes, don't ya. 00:14:39.641 --> 00:14:46.539 oh please. to the bone mobile. 00:14:46.539 --> 00:14:49.402 [Moo] Hey, leave that cow alone. I'm bone 00:14:49.402 --> 00:14:55.033 boy! but i was going to milk it. then you 00:14:55.033 --> 00:15:01.478 know that milk is a strong source of calcium. I'm bone boy!! 00:15:01.478 --> 00:15:04.487 Ahh calcium. [tink tink on glass] Milk is a 00:15:04.487 --> 00:15:08.042 good source of calcium and other minerals 00:15:08.042 --> 00:15:11.240 is what help make your bones so strong. 00:15:11.240 --> 00:15:14.770 here's a t-bone from a t-bone steak and here's 00:15:14.770 --> 00:15:17.924 a piece of aircraft aluminum 00:15:17.924 --> 00:15:20.404 you hold them like this they have the same 00:15:20.404 --> 00:15:23.676 sizes and shape, which one is stronger 00:15:23.676 --> 00:15:26.077 take a look, we've mounted them both on this 00:15:26.077 --> 00:15:31.023 t-stand of science. t-bone, t-stand, haha let's 00:15:31.023 --> 00:15:33.692 put some heavy weights on them. this would 00:15:33.692 --> 00:15:39.133 be a couple of liters of heavy soft drink. 00:15:39.133 --> 00:15:42.793 they both bend down about the same amount. 00:15:42.793 --> 00:15:45.336 that's not all there is to having bones 00:15:45.336 --> 00:15:50.942 you playing soccer and get hit in the ribs in the t-bone 00:15:50.942 --> 00:15:53.141 watch, we'll simulate getting hit in the bone 00:15:53.141 --> 00:15:58.485 with this pair of plyers, t-bone pretty strong 00:15:58.485 --> 00:16:05.341 aircraft aluminum not so strong. see it a 00:16:05.341 --> 00:16:11.021 good thing you're made of bone. 00:16:11.021 --> 00:16:15.072 a real good thing. milk a strong source of 00:16:15.072 --> 00:16:30.118 calcium. I'm bone boy. 00:16:30.118 --> 00:16:32.274 wrestling has a lot of do with balance and 00:16:32.274 --> 00:16:35.980 strength, speed, agility and moving joints the 00:16:35.980 --> 00:16:57.638 wrong way. It's a lot of fun! 00:16:57.638 --> 00:17:05.739 Now what? By doing this bending the knee joint the opposite way 00:17:05.739 --> 00:17:08.051 Elbows bent like this by putting more pressure 00:17:08.051 --> 00:17:10.490 on it the joint, it'll pull away from the 00:17:10.490 --> 00:17:14.852 shoulder and causes him to have pain. 00:17:14.852 --> 00:17:24.596 wrestling is painful, but it's fun! 00:17:24.596 --> 00:17:28.053 I win! 00:17:28.053 --> 00:17:30.509 Your back bone isn't 1 single bone, it's 00:17:30.509 --> 00:17:34.685 actually 33 small bones stacked on top of each 00:17:34.685 --> 00:17:37.982 other. small bones are called vertebra 00:17:37.982 --> 00:17:40.178 and they're hollow they protect your spinal 00:17:40.178 --> 00:17:42.484 cord the bundle of nerves that run down 00:17:42.484 --> 00:17:45.300 your back. Now the spinal column supports 00:17:45.300 --> 00:17:49.827 your whole body. a bunch of gliding joints 00:17:49.827 --> 00:17:53.310 they glide on each other because each vertebra 00:17:53.310 --> 00:17:57.609 separated by a soft squishy disk called cartilage. 00:17:57.609 --> 00:18:00.364 the same stuff you have in your nose. 00:18:00.364 --> 00:18:04.270 so your spinal column has a whole bunch of gliding joints. that's what makes you flexible. 00:18:04.270 --> 00:18:10.375 you can i have 33 vertebra a big snake like thi 00:18:10.375 --> 00:18:12.779 has over 400. thats why snakes are so 00:18:12.779 --> 00:18:15.582 flexible. you know Mr. Python that's a great 00:18:15.582 --> 00:18:19.654 looking backbone. A great looking set of back bones. 00:18:19.654 --> 00:18:20.528 it's really nice. Mr. Python, Mr. Phython, Mr. Pyyyython. 00:18:20.528 --> 00:18:40.580 They came from the spindarosa bone-anza! 00:18:40.580 --> 00:18:46.187 So little Joe I aint what you call fat am I? 00:18:46.187 --> 00:18:54.204 I'm just big boned, right? Yea, big boned, that's what you are. 00:18:54.204 --> 00:18:56.565 actually there really no such thing as big 00:18:56.565 --> 00:19:02.709 boned. most humans have the same bones in the same size. 00:19:02.709 --> 00:19:07.974 so my bones they are about the same size as his. buy guys like Hass 00:19:07.974 --> 00:19:13.175 you know how sensitive they can be. Yup, big 00:19:13.175 --> 00:19:19.272 boned that what I am. Yea, big boned 00:19:19.272 --> 00:19:22.252 Did you know that...muscle makes up 85% OF YOUR 00:19:22.252 --> 00:19:24.993 body weight. a human skeleton starts out as 00:19:24.993 --> 00:19:27.122 cartilage that hardens into bones over your 00:19:27.122 --> 00:19:53.787 entire lifetime. Bones is stronger inch to inch than skyscrappers. Now you know! 00:19:53.787 --> 00:19:58.830 our bones move in different ways because they're all connected by joints. 00:19:58.830 --> 00:20:30.963 they all work together so we can do things like this. 00:20:30.963 --> 00:20:34.740 Got bones in my body, or else i'd be like 00:20:34.740 --> 00:20:40.350 jelly. they help me stand up staight so i can 00:20:40.350 --> 00:20:47.609 perform ballet. yea, i got bones in my body 00:20:47.609 --> 00:20:51.692 working with my muscles too. they let me do my 00:20:51.692 --> 00:21:03.207 ballet and how about you. like a true burn brake i think bones bones are great, they 00:21:03.207 --> 00:21:16.734 work with muscles too they're in me and you! bones in my body! 00:21:16.734 --> 00:21:31.414 bones in my body! thanks for muscling in to 00:21:31.414 --> 00:21:36.305 see this show. it sent chills up my spine. if you 00:21:36.305 --> 00:21:42.868 excuse me I need to bone up for the next 00:21:42.868 --> 00:21:45.008 show. produced in association with the national 00:21:45.008 --> 00:21:53.566 science foundation. what? it's the fin isn't it. 00:21:53.566 --> 00:21:57.116 your bones are connected to your muscles and 00:21:57.116 --> 00:22:02.678 the 2 of them working together will allow you to ride your bike up this hill. 00:22:02.678 --> 00:22:06.864 see the stiff bones are connected to the soft 00:22:06.864 --> 00:22:12.652 muscles. Race ya! Fools, they laughed at 00:22:12.652 --> 00:22:18.156 me. i use bones and muscles to answer the 00:22:18.156 --> 00:22:32.310 phone, small world huh? Alien boy, love ya. that was my mom