Catch up TV

This episode is currently not available.

Series 1: 8. Blood Pressure Monitor and Cast



Maddie visits a hospital. She uses a special light to see the blood vessels under her skin and finds out how a blood pressure monitor works to check that blood is flowing freely around our bodies. Maddie then visits the plaster room and shows how a cast is made by having one put on her arm. She uses a special microscope camera to reveal how the fibreglass strands are woven together to make the cast strong.

Source: CBeebies

Most recent episodes of Do You Know?

Do You Know?

Do You Know? - Series 1: 5. Bike Chain And Tennis Ball

Series 1: 5. Bike Chain And Tennis Ball

Maddie is outside being active. She uses a special camera to find out how the chain on a bicycle works to turn the wheels and how the front wheel and handlebars are used to stee ...

15-02-2019

CBeebies

All episodes

CBeebies

Do You Know?

Do You Know? - Series 1: 4. Bin Lorry And Newspaper

Series 1: 4. Bin Lorry And Newspaper

Maddie does the recycling. She uses a special camera to find out how a bin lorry works to lift a bin and tip the rubbish into the hopper. An animation reveals how a moving wall ...

14-02-2019

CBeebies

All episodes

CBeebies

Do You Know?

Do You Know? - Series 1: 3. Fizzy Water And Yoghurt

Series 1: 3. Fizzy Water And Yoghurt

Maddie looks at food and drink. She uses a special slow-motion camera to find out how bubbles get inside a bottle of fizzy water. Animation shows how gas is used to create the b ...

13-02-2019

CBeebies

All episodes

CBeebies

Do You Know?

Do You Know? - Series 1: 2. Fire Engine Hose And Reflective Strips

Series 1: 2. Fire Engine Hose And Reflective Strips

Maddie looks at the emergency services. She uses a special camera to find out how the hose on a fire engine works and how the pump inside the fire engine creates pressure and se ...

12-02-2019

CBeebies

All episodes

CBeebies

Do You Know?

Do You Know? - Series 1: 1. Hamster Wheel And Insect Hotel

Series 1: 1. Hamster Wheel And Insect Hotel

Maddie meets some furry friends and creepy crawlies. She visits a pet shop and uses a special night-vision camera to find out how a hamster wheel works and how far a hamster can ...

11-02-2019

CBeebies

All episodes

CBeebies

Do You Know?

Do You Know? - Series 2: 25. Refrigerator And Mushrooms

Series 2: 25. Refrigerator And Mushrooms

In today's episode, Maddie is at home to show us how a refrigerator works. She explains how the pump and the long pipes inside a fridge change a cooling liquid into a gas t ...

08-02-2019

CBeebies

All episodes

CBeebies

Do You Know?

Do You Know? - Series 2: 24. Barcode And Fish Cake

Series 2: 24. Barcode And Fish Cake

In today's episode, Maddie is visiting a supermarket, where she finds out what barcodes are and how they work. At the checkout, we learn how an infrared scanner reads barco ...

07-02-2019

CBeebies

All episodes

CBeebies

Do You Know?

Do You Know? - Series 2: 23. Prosthetic Limb And Detection Dog

Series 2: 23. Prosthetic Limb And Detection Dog

In today's episode, Maddie is looking at the way things are made or trained to help us. First, she meets seven-year-old Anu, who uses a prosthetic leg. Maddie visits a work ...

06-02-2019

CBeebies

All episodes

CBeebies

Do You Know?

Do You Know? - Series 2: 22. Hand Dryer And Toilet Roll

Series 2: 22. Hand Dryer And Toilet Roll

In today's episode, Maddie is looking at things we use when we go to the toilet. She visits a factory to see how hand dryers work. She shows us how infrared light is used t ...

05-02-2019

CBeebies

All episodes

CBeebies

Do You Know?

Do You Know? - Series 2: 21. Fish Tank And Bath

Series 2: 21. Fish Tank And Bath

In today's episode, Maddie finds out about things that use water. She visits an aquatic centre to show us how a fish tank works, using a special underwater camera to explai ...

04-02-2019

CBeebies

All episodes

CBeebies

Most popular episodes of Do You Know?

Do You Know?

Do You Know? - Series 1: 13. Toilet Flush And Toilet

Series 1: 13. Toilet Flush And Toilet

Maddie is in the bathroom. She uses a special underwater camera to find out how a toilet flush works and why it makes a gurgling sound. An animation shows how the float ball and ...

27-12-2018

CBeebies

All episodes

CBeebies

Do You Know?

Do You Know? - Series 2: 12. Traffic Lights And Emergency Lights

Series 2: 12. Traffic Lights And Emergency Lights

In today's episode, Maddie is looking at useful lights. She shows us how traffic lights work so that vehicles can travel safely through a road junction. She visits a traffi ...

22-01-2019

CBeebies

All episodes

CBeebies

Do You Know?

Do You Know? - Series 1: 15. Crane And Bricks

Series 1: 15. Crane And Bricks

Maddie visits a building site. She uses a special camera to see how a big crane works to move heavy objects from one place to another. An animation shows how the hydraulic mecha ...

28-12-2018

CBeebies

All episodes

CBeebies

Do You Know?

Do You Know? - Series 1: 10. Water Park And Ice Cream

Series 1: 10. Water Park And Ice Cream

Maddie goes for a fun day out. She visits an indoor water park and uses a special waterproof camera and animation to show how a water slide works. She then goes underneath the s ...

26-12-2018

CBeebies

All episodes

CBeebies

Do You Know?

Do You Know? - Series 1: 25. Cake And Soft Play

Series 1: 25. Cake And Soft Play

Maddie is getting ready for a party. She uses a special camera and animation to find out how cake ingredients work together to make cake sponges rise in the oven. Next, Maddie v ...

04-01-2019

CBeebies

All episodes

CBeebies

Do You Know?

Do You Know? - Series 2: 17. Bubbles And Chocolate

Series 2: 17. Bubbles And Chocolate

In today's episode, Maddie is having a party! She finds out how bubbles work when we blow into bubble mixture. She shows us how the surface tension of water changes when we ...

29-01-2019

CBeebies

All episodes

CBeebies

Do You Know?

Do You Know? - Series 2: 16. Posting A Letter And Colouring Pencils

Series 2: 16. Posting A Letter And Colouring Pencils

In today's episode, Maddie is sending a letter in the post to the CBeebies house. She finds out how posting a letter works as she follows the letter's journey from the ...

28-01-2019

CBeebies

All episodes

CBeebies

Do You Know?

Do You Know? - Series 2: 4. Clock And Cutlery

Series 2: 4. Clock And Cutlery

Today, Maddie is finding out how clocks tell the time. She heads to a clock factory and uses a special time-lapse camera to show how the hands on the clock move around. Maddie a ...

10-01-2019

CBeebies

All episodes

CBeebies

Do You Know?

Do You Know? - Series 1: 21. Magnets And Teddy Bears

Series 1: 21. Magnets And Teddy Bears

Maddie is looking at toys. She uses a special slow-motion camera to find out how the magnets on a train set work. An animation shows how the north and south poles on magnets wor ...

01-01-2019

CBeebies

All episodes

CBeebies

Do You Know?

Do You Know? - Series 1: 17. Piano And Drums

Series 1: 17. Piano And Drums

Maddie looks at musical instruments. She uses a special slow-motion camera to find out how a piano works and how the keys on the piano are attached to levers and hammers. She sh ...

31-12-2018

CBeebies

All episodes

CBeebies

© 2019 - Catchupplayer.co.uk