0:00:02 > 0:00:05Operation Poop-Snoop to Brain Freeze HQ -
0:00:05 > 0:00:08we are now passing through the oesophagus. Over.
0:00:08 > 0:00:10Receiving you loud and clear.
0:00:10 > 0:00:12How's our guinea pig doing?
0:00:12 > 0:00:14Careful in there, you two,
0:00:14 > 0:00:17this is one scientific mission I do not want you to get wrong.
0:00:17 > 0:00:19The things we do for science, eh, Doctor?
0:00:19 > 0:00:23Shrunk down to the size of a pea and travelling through Colin's insides.
0:00:23 > 0:00:28Buckle up, Professor, I think it's going to be a bumpy ride.
0:00:28 > 0:00:32We're going live from my digestive system in five, four, three...
0:00:32 > 0:00:35This is Brain Freeze!
0:00:35 > 0:00:37With Dr Knowles,
0:00:37 > 0:00:41Professor McCork,
0:00:41 > 0:00:44Colin the floor manager
0:00:44 > 0:00:46and Ms Hucklebuck.
0:00:46 > 0:00:52- Standby!- Welcome to the Brain Freeze digestion special!
0:00:52 > 0:00:54It's time for...
0:00:54 > 0:00:57Today's Big Question!
0:00:57 > 0:00:59Today, we're asking...
0:00:59 > 0:01:02Hm! ..where does poo come from?
0:01:02 > 0:01:03- PARP! - Ooo!
0:01:03 > 0:01:06Our digestive system is made up of multiple organs
0:01:06 > 0:01:09designed to turn the food we eat into nutrients,
0:01:09 > 0:01:13which the body uses for energy, growth and repair.
0:01:13 > 0:01:16It begins in our mouths, where chewing and saliva break down food.
0:01:16 > 0:01:19From here, the oesophagus, a muscular tube,
0:01:19 > 0:01:22carries food to the stomach by means of a series of contractions.
0:01:22 > 0:01:25BOTH: Whoa! Here we go!
0:01:25 > 0:01:28Once in the stomach, food gets mixed and ground up,
0:01:28 > 0:01:32with powerful stomach acid and enzymes continuing to break it down.
0:01:32 > 0:01:37And did you know stomach acid is strong enough to burn through wood?
0:01:37 > 0:01:40- Aaaah!- Luckily, our stomachs...
0:01:40 > 0:01:43- Like the Pooper-Snooper. - ..are protected by a layer of mucus
0:01:43 > 0:01:46that prevents the acid from eating through the stomach lining.
0:01:46 > 0:01:50Hurry up in there! I think I need to use the bathroom!
0:01:50 > 0:01:52BOTH: Uh-oh!
0:01:53 > 0:01:57Um...we seem to have lost the signal. Oh, dear.
0:01:57 > 0:02:00We'll be right back!
0:02:00 > 0:02:02And we're clear.
0:02:02 > 0:02:05I really need to go, Ms Hucklebuck!
0:02:05 > 0:02:08Hang in there, Jonathan, we'll figure this out.
0:02:08 > 0:02:12Hucklebuck to Pooper-Snooper. Come in, please.
0:02:13 > 0:02:16Ah, it's no good, it's completely dead!
0:02:16 > 0:02:17Speaking of dead,
0:02:17 > 0:02:20I think Colin might need to take a look at his diet.
0:02:20 > 0:02:22There's some very strange stuff in here.
0:02:24 > 0:02:27Never mind his diet, we need to find the exit to his intestines
0:02:27 > 0:02:29or we'll never get out of here!
0:02:30 > 0:02:35Yes! We're back! You're just approaching the exit, Dr Knowles.
0:02:35 > 0:02:37Full speed ahead.
0:02:37 > 0:02:41There it is! Hold tight, Professor, we're going in!
0:02:41 > 0:02:44Er...I think you mean out.
0:02:46 > 0:02:49Today's Big Answer!
0:02:49 > 0:02:51So, tell us, Ms Hucklebum...
0:02:51 > 0:02:52HE LAUGHS
0:02:52 > 0:02:55Hucklebum! That's brilliant, that is! Ha!
0:02:55 > 0:02:58So, tell us, where does poo come from?
0:02:58 > 0:03:01Once it leaves the stomach, food enters the small intestine,
0:03:01 > 0:03:04a narrow tube around six metres long.
0:03:04 > 0:03:08The walls of the small intestine absorb nutrients from food
0:03:08 > 0:03:10and pass them into the bloodstream.
0:03:10 > 0:03:12And what's left over moves into the large intestine,
0:03:12 > 0:03:14before eventually...
0:03:15 > 0:03:17Before eventually...
0:03:17 > 0:03:18SHE COUGHS
0:03:18 > 0:03:20Oh, what a pong!
0:03:20 > 0:03:24Brace yourself, Professor! Here we go!
0:03:26 > 0:03:28And I think you can figure out the rest.
0:03:28 > 0:03:30Er...Jonathan?
0:03:30 > 0:03:32PARP!
0:03:32 > 0:03:34Oh! Ooo! Oh! Ah!
0:03:34 > 0:03:37See you next time.
0:03:42 > 0:03:43Ahhhhh!
0:03:43 > 0:03:46I hope you washed your hands, Jonathan!
0:03:46 > 0:03:49Of course, Ms Hucklebuck. You know me.
0:03:50 > 0:03:53- Whaa!- Whoa!- So, so dark!
0:03:53 > 0:03:55- Never again!- Ha-ha!
0:03:55 > 0:03:56Well, I don't know about you lot,
0:03:56 > 0:04:00but I think we'll have to do a spring clean every year from now on.
0:04:00 > 0:04:06Not me. No way! From now on, I'm sticking to life-sized science.
0:04:06 > 0:04:10Well, well! We're all tough scientists on the outside,
0:04:10 > 0:04:14but we all know it's what's on the inside that counts.
0:04:14 > 0:04:15Eh, Jonathan?
0:04:15 > 0:04:17SHE LAUGHS
0:04:17 > 0:04:19- PARP! - Ooo! Pardon me.
0:04:19 > 0:04:21And by the way, the name's Colin.
0:04:21 > 0:04:23- PARP! - Oh!
0:04:24 > 0:04:27- PARP! - Oh! Sorry.
0:04:27 > 0:04:30- PARP! - Oh, watch out behind.
0:04:30 > 0:04:32- PARP! - I'm really sorry.
0:04:32 > 0:04:33Oh! Oh, dear!
0:04:33 > 0:04:35Oh, there's another. That was me. I'm sorry!