0:00:05 > 0:00:08# If you've got a question and you don't know where to go
0:00:08 > 0:00:11# Ask Nina for some help Cos she's got a science show
0:00:11 > 0:00:15# She makes sense of her senses While helping all her fans
0:00:15 > 0:00:17# By doing her experiments with potions and with bangs
0:00:17 > 0:00:19- # Touch your tongue - Tongue!
0:00:19 > 0:00:20- # Fingers - Fingers!
0:00:20 > 0:00:23- # Eyes.- Eyes! - Ears.- Ears!- Nose.- Nose!
0:00:23 > 0:00:26# Nina and the Neurons find out what you need to know
0:00:26 > 0:00:29# Nina and the Neurons find out what you need to know
0:00:29 > 0:00:32# Luke, he helps us with our eyes and Felix with our touch
0:00:32 > 0:00:35# Ollie sniffs out smells And Belle, she hears so much
0:00:35 > 0:00:38# Bud is Ollie's brother He helps us with our taste
0:00:38 > 0:00:41# They're Nina's little Neurons And they're coming to your place!
0:00:41 > 0:00:43- # Touch your tongue - Tongue!
0:00:43 > 0:00:44- # Fingers - Fingers!
0:00:44 > 0:00:48- # Eyes.- Eyes! - Ears.- Ears!- Nose.- Nose!
0:00:48 > 0:00:50# Nina and the Neurons find out what you need to know
0:00:50 > 0:00:53# Nina and the Neurons find out what you need to know
0:00:53 > 0:00:54# Oh yeah! #
0:00:55 > 0:00:57RAT-A-TAT-TAT
0:00:57 > 0:01:03Hello! You've caught me practising my drumming. It's so much fun.
0:01:03 > 0:01:04I can make a slow beat.
0:01:04 > 0:01:07RAT...A..TAT...TAT
0:01:07 > 0:01:09And I can make a fast beat.
0:01:09 > 0:01:11RAT-A-TAT-TAT
0:01:11 > 0:01:13BEEPING
0:01:14 > 0:01:18I hear a beep, I see a flash, I wonder what they're going to ask.
0:01:23 > 0:01:24BOTH: Hi, Nina.
0:01:24 > 0:01:27- Hello. - We've got a question for you.
0:01:27 > 0:01:28Why does our heart beat?
0:01:28 > 0:01:32That's a great question. Why does our heart beat?
0:01:32 > 0:01:37I love to make my drum beat, but our heartbeat is even more brilliant.
0:01:37 > 0:01:40Come down to the lab and we'll do some experiments to investigate.
0:01:40 > 0:01:44- BOTH: See you soon, Nina. Bye! - Bye.
0:01:44 > 0:01:47I'm going to need some help to answer this one
0:01:47 > 0:01:49and I know just who to ask.
0:01:49 > 0:01:51OK, Neurons, time to get to work.
0:02:08 > 0:02:10ALL: Neurons at the ready, Nina.
0:02:10 > 0:02:15OK. Today's question is, "Why does our heart beat?"
0:02:15 > 0:02:18Which Neuron will be most useful to help find the answer?
0:02:18 > 0:02:21ALL: Me! Me! Me! Oh, me!
0:02:21 > 0:02:24Will it be fabulous Felix?
0:02:24 > 0:02:27I can help so very much if you need the sense of touch.
0:02:27 > 0:02:30Will it be beautiful Belle?
0:02:30 > 0:02:34I send messages to brain from ear. If there's a sound, I'll help you hear.
0:02:34 > 0:02:36Will it be lovely Luke?
0:02:36 > 0:02:38For looking and seeing, day or night,
0:02:38 > 0:02:41I'll help you with your sense of sight.
0:02:41 > 0:02:43Will it be awesome Ollie?
0:02:43 > 0:02:45If it's pongy or whiffy but you can't tell,
0:02:45 > 0:02:49my messages help your sense of smell. Or will it be baby Bud?
0:02:49 > 0:02:54Sour, salty, bitter or sweet, I'm your taste buddy whenever you eat!
0:02:54 > 0:02:57BEEPING
0:02:57 > 0:02:58- It's all the Neurons!- Yippee!
0:02:58 > 0:03:05ALL: Go, Neurons, go, Neurons, go, Neurons, go, Neurons,!
0:03:05 > 0:03:10All Neurons hip-hop happy to help, Nina!
0:03:10 > 0:03:13Today's question is, "Why does our heart beat?"
0:03:13 > 0:03:16Our hearts are important for every part of our brilliant bodies
0:03:16 > 0:03:18so all of the Neurons will be helping me today.
0:03:18 > 0:03:22Right, I need to get the lab ready before the experimenters arrive.
0:03:24 > 0:03:28Travis likes karate and Eilidh likes meerkats.
0:03:28 > 0:03:31But they both want to know why our heart beats,
0:03:31 > 0:03:36so today for one day only, Travis and Eilidh become the experimenters!
0:03:40 > 0:03:41- Hi, Guys.- BOTH: Hi, Nina.
0:03:41 > 0:03:44Welcome to my science lab. Come on in.
0:03:46 > 0:03:49Now you asked why does our heart beat, which is a great question.
0:03:49 > 0:03:51Why do you want to know?
0:03:51 > 0:03:54Because when I hug my mummy I can hear her heart beat.
0:03:54 > 0:03:59- And we want to know why it beats. - Oh, I love a good hug, don't you?
0:03:59 > 0:04:01BOTH: Yes!
0:04:01 > 0:04:04And our heart is an important part of our brilliant body
0:04:04 > 0:04:06so we should find out why it beats.
0:04:06 > 0:04:09For our first experiment, we're going to use our senses.
0:04:09 > 0:04:14ALL: Woo-hoo! A senses experiment. We're ready, Nina.
0:04:14 > 0:04:17Can you show me where you think your heart is in your body?
0:04:17 > 0:04:22- It's here.- Here.- Very good. You're right.
0:04:22 > 0:04:26Our heart is in the middle of our chest a little bit to the left.
0:04:28 > 0:04:33Now you're probably used to seeing pretend hearts like this one,
0:04:33 > 0:04:36but a real heart is quite different.
0:04:36 > 0:04:39Have a look at this model and describe it for me.
0:04:39 > 0:04:45- It's got tubes.- Yes.- And they're like veins.- Yeah, they are like veins.
0:04:45 > 0:04:48We've got tubes going in and tubes coming out.
0:04:48 > 0:04:53And there's also some hollow spaces inside that are called chambers.
0:04:53 > 0:04:57As Eilidh was saying earlier, we can sometimes hear our heartbeat
0:04:57 > 0:04:59so let's put these on.
0:05:01 > 0:05:05Hear a heartbeat? Sounds like a job for me, Nina.
0:05:05 > 0:05:08It certainly is, Belle. This is called a stethoscope.
0:05:08 > 0:05:12Doctors use them to listen to our hearts beating.
0:05:12 > 0:05:17Just press the round bit to your chest and listen.
0:05:17 > 0:05:19BA-BOOM BA-BOOM
0:05:20 > 0:05:23- Can you hear your heart beating? - BOTH: Yes.
0:05:23 > 0:05:28Wow! Nina's heartbeat sounds like a drum beating.
0:05:28 > 0:05:30Ba-boom! Ba-boom! Ba-boom!
0:05:30 > 0:05:32It does, Belle.
0:05:32 > 0:05:36Let's see if we can make a noise that sounds like our heartbeat.
0:05:37 > 0:05:40Ba-boom! Ba-boom! Ba-boom!
0:05:40 > 0:05:44ALL: Ba-boom! Ba-boom! Ba-boom!
0:05:44 > 0:05:49OK, so let's take our stethoscopes off. Wow!
0:05:49 > 0:05:52So we have used our senses to see what a heart looks like.
0:05:52 > 0:05:56And to feel and hear our heart beating.
0:05:56 > 0:05:58But we still don't know why our heart beats.
0:05:58 > 0:06:01So to find out I think we need to visit a place where people
0:06:01 > 0:06:03have lots of fun.
0:06:03 > 0:06:04Let's go, experimenters!
0:06:04 > 0:06:05BOTH: Yeah!
0:06:10 > 0:06:12Where do you think we're going today?
0:06:12 > 0:06:15Nina said it's a place where people have lots of fun.
0:06:15 > 0:06:19Maybe it's a chocolate factory! That would be lots of fun for me.
0:06:19 > 0:06:22It doesn't look like a factory, Bud.
0:06:22 > 0:06:25Sharpen your senses, Neurons, we're here.
0:06:25 > 0:06:28And Nina feels very excited.
0:06:32 > 0:06:36So, experimenters, you asked why does our heart beat.
0:06:36 > 0:06:40To help answer that question, I've brought you to this fun park
0:06:40 > 0:06:43to find out about the really important job our heart does.
0:06:43 > 0:06:48Our heart helps move blood all around our brilliant bodies.
0:06:48 > 0:06:50So it sends blood all the way up to our heads,
0:06:50 > 0:06:56all the way down to our toes, and all around everywhere in between.
0:06:56 > 0:07:01- Now, do you see this White Water ride?- BOTH: Yes, Nina.
0:07:01 > 0:07:05Well, we're going to pretend that the water moving around
0:07:05 > 0:07:08this ride is like the blood moving around inside our bodies.
0:07:08 > 0:07:11And unfortunately we're going to have to...
0:07:11 > 0:07:13..have a go on the ride!
0:07:13 > 0:07:15- BOTH: Yeah!- Follow me!
0:07:22 > 0:07:25SCREAMING AND LAUGHING
0:07:28 > 0:07:33Oh, my word! Oh, dear! It feels very fa-a-a-ast!
0:07:33 > 0:07:37SCREAMING
0:07:45 > 0:07:48That was brilliant!
0:07:48 > 0:07:52- Did you enjoy that, guys? - BOTH: Yes! It was great!
0:07:52 > 0:07:54But how does the water move around the ride?
0:07:54 > 0:07:57That's a great question, Eilidh.
0:07:57 > 0:07:59Finding out the answer will also tell us
0:07:59 > 0:08:01more about why our heart beats.
0:08:01 > 0:08:05Over there in the middle of the ride is a big machine called a pump.
0:08:05 > 0:08:09It pushes the water round the White Water ride.
0:08:09 > 0:08:12Our heart is our body's pump.
0:08:12 > 0:08:13But instead of moving water,
0:08:13 > 0:08:16the heart pumps to move blood around inside us.
0:08:16 > 0:08:20That's what our heart is doing when it beats inside our chest.
0:08:20 > 0:08:24- Watch. - SHE LAUGHS
0:08:26 > 0:08:30So, every time our heart beats it moves blood around inside us.
0:08:30 > 0:08:34This happens again and again. Our hearts are always beating
0:08:34 > 0:08:38and always pumping blood all the way around our bodies.
0:08:38 > 0:08:41The blood keeps going round and round inside us all day
0:08:41 > 0:08:42and all night.
0:08:42 > 0:08:45Like the water goes round and round the ride.
0:08:45 > 0:08:48That's right, Ollie. But how does this work?
0:08:48 > 0:08:52Let's head back to the lab for one final experiment.
0:08:52 > 0:08:53BOTH: Yes!
0:08:56 > 0:09:00Now here is a model of the body.
0:09:00 > 0:09:04If you squeeze this pretend heart with your hand, just like this,
0:09:04 > 0:09:07it pumps the red water inside the tubes around the body.
0:09:10 > 0:09:14And our real body has lots of little tubes inside it too.
0:09:14 > 0:09:18And the heart pumps blood through them to all the places it's needed.
0:09:18 > 0:09:21Eilidh, would you like to have a go at pumping the heart?
0:09:21 > 0:09:25Travis, watch carefully and tell us what's happening inside the tubes.
0:09:25 > 0:09:27Off you go, Eilidh.
0:09:29 > 0:09:31What can you see happening, Travis?
0:09:31 > 0:09:35The glitter is coming up
0:09:35 > 0:09:40and the blood's coming through the tubes.
0:09:40 > 0:09:41Well spotted.
0:09:41 > 0:09:44Remember we're pretending that the red water inside the tubes
0:09:44 > 0:09:46is blood inside our bodies
0:09:46 > 0:09:50being pumped around by our hearts.
0:09:50 > 0:09:52And the water has bits in it, glittery bits,
0:09:52 > 0:09:55because our blood also has things in it.
0:09:55 > 0:10:00Our blood carries important things like the oxygen we breathe in
0:10:00 > 0:10:02and good stuff from the food we eat.
0:10:02 > 0:10:05Remember when we listened to our hearts earlier?
0:10:05 > 0:10:07Well, let's do that again
0:10:07 > 0:10:10Ooh!
0:10:11 > 0:10:14- BA-BOOM BA-BOOM - So, listen.
0:10:16 > 0:10:19Ba-boom! Ba-boom! Ba-boom!
0:10:19 > 0:10:23- I can hear, "Ba-boom, ba-boom," can you?- Yes.- Yes.
0:10:23 > 0:10:26Let's see if anything happens to our heartbeat
0:10:26 > 0:10:27when we do some exercises.
0:10:27 > 0:10:32OK, er, lets start by running on the spot.
0:10:33 > 0:10:35Get ready and go!
0:10:35 > 0:10:38- NINA PANTS - Woo!
0:10:38 > 0:10:39Come on, faster!
0:10:39 > 0:10:41Ha-ha-ha!
0:10:41 > 0:10:42OK, er, star jumps.
0:10:42 > 0:10:43OK, with me.
0:10:43 > 0:10:48One, two, three, four, five...
0:10:48 > 0:10:50Oh, that'll do!
0:10:50 > 0:10:54OK, now let's check our hearts again. Oh, in my ears.
0:10:57 > 0:10:58BA-BOOM BA-BOOM
0:11:00 > 0:11:05- Are they beating slower or faster? - Faster.- Faster.- Yeah!
0:11:05 > 0:11:08Your heart's beating MUCH faster now, Nina.
0:11:08 > 0:11:12- Ba-boom, ba-boom. Ba-boom, ba-boom! - Thanks, Belle.
0:11:12 > 0:11:15So, when we run around or do any kind of exercise
0:11:15 > 0:11:18our bodies need extra supplies of oxygen
0:11:18 > 0:11:20to help release energy from our food,
0:11:20 > 0:11:22so our heart beats a lot faster
0:11:22 > 0:11:25to pump the blood around the body more quickly,
0:11:25 > 0:11:27delivering more oxygen.
0:11:32 > 0:11:36You asked, "Why does our heart beat?", I think we've answered it.
0:11:36 > 0:11:38We discovered that our heart beats
0:11:38 > 0:11:41because it's pumping blood around inside us
0:11:41 > 0:11:45to the tops of our heats, the tips of our toes
0:11:45 > 0:11:48and everywhere in between. That's an important job
0:11:48 > 0:11:52because our blood carries good things that our bodies need.
0:11:52 > 0:11:55Like oxygen we breathe and good stuff from food we eat.
0:11:55 > 0:11:59When we exercise our bodies need more of these good things
0:11:59 > 0:12:03so our heart has to work harder to pump the blood around inside us
0:12:03 > 0:12:04even faster.
0:12:04 > 0:12:07That's why we feel and hear our heart beating
0:12:07 > 0:12:10when we've been running around being active.
0:12:10 > 0:12:14- I hope that's answered your question.- BOTH: Thanks, Nina. Bye.
0:12:14 > 0:12:15Bye.
0:12:19 > 0:12:23If you want find out more about the science all around us,
0:12:23 > 0:12:27go to the Nina section on the CBeebies website. Have fun!
0:12:27 > 0:12:32- Hearts beating.- Lungs breathing. - Fingers feeling.- Mouths eating!
0:12:32 > 0:12:34And don't forget your brain!
0:12:34 > 0:12:37# Brilliant bodies, brilliant bodies
0:12:37 > 0:12:39# Inside and o-o-out
0:12:39 > 0:12:42# Brilliant bodies, brilliant bodies
0:12:42 > 0:12:44# Come on let's find out about
0:12:44 > 0:12:47# Handy hands and bendy knees
0:12:47 > 0:12:49# Stretchy backs And noses that sneeze
0:12:49 > 0:12:52# We all have brilliant bodies
0:12:52 > 0:12:54Brilliant bodies!
0:12:54 > 0:12:57# Every part has a job to do
0:12:57 > 0:13:00# Even scabs and earwax too
0:13:00 > 0:13:03# We all have brilliant bodies
0:13:03 > 0:13:04Brilliant bodies!
0:13:04 > 0:13:08# Brilliant bodies, brilliant bodies
0:13:08 > 0:13:10# Lashes to protect our eyes
0:13:10 > 0:13:13# Brilliant bodies, brilliant bodies
0:13:13 > 0:13:16# And don't forget to exercise. #
0:13:16 > 0:13:19Oh, I've had a brilliant day.
0:13:19 > 0:13:22I got to hear Nina's heart beating like a drum,
0:13:22 > 0:13:27"Ba-boom, ba-boom, ba-boom, ba-boom, ba-boom, ba-boom, ba-boom!"
0:13:27 > 0:13:33I've had a fabby day! The White Water ride was BRILLIANT!
0:13:33 > 0:13:38- The water moved round and round! - Ah, it's been such a GREAT day, man.
0:13:38 > 0:13:43Seeing how the heart pumps blood around inside us. Very cool!
0:13:43 > 0:13:46Remember, everyone's body is different,
0:13:46 > 0:13:49but they're all brilliant. See you soon, bye!
0:13:49 > 0:13:52E-mail subtitling@bbc.co.uk