Welcome along, Explorer. It's time for a brand new quick, swift search around the universe for all those science secrets.

My name's Dan. It's a brand new fun kid science midweekly. And it's a question special.

If you have any question that you want answered on this here podcast, make sure you leave it as a voice note for me on the free Fun Kids app. You can do it at FunKidslive.com too. I will do all the digging. I can't wait for you to star in our show and do some science searching for you. First one up this week, it's from Alex. What do you have?

Hi, my name is Alex, and my question is, what makes blood cells and how does it do that? Thank you.

So what makes blood vessels, Alex? Well, blood is made of cells and plasma. Plasma's like a yellow fluid. It's got nutrients and

proteins and all the things in there that keep you alive. Different types of blood cells have different

jobs. Red blood cells, they carry oxygen. Different parts of your body needs this to keep your muscles

moving, your brain working. So that's the red blood

cells. The white blood cells really important. They're part of your immune system. They help fight

bacteria. They get to work if there's an invader, if there's a virus that's trying to

try to get at you, that's trying to cause you some harm. Also in your blood, you've got platelets.

They're tiny cells.

They are oval shaped and they help to clog up your blood when you're bleeding. Now, cells are made in the

liver and in the spleen before you're born, but you always need to make new cells, new blood cells,

and they're normally made in the bone marrow,

which is the soft, spongy tissue right in the middle of your bones.

So those are the different cells that make up your blood, Alex.

Thank you very much for the question.

Here is one from Imogen.

Who wants to know? What exactly would happen to a human in space without a space suit?

Ooh.

All right.

...