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cover of episode Why do we get bruises?

Why do we get bruises?

2025/3/27
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Moment of Um

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Anna Weigel
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Julia
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Shira Rosenberg
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Julia: 我想知道为什么淤青是紫色和蓝色的,以及我们是如何得到它们的。 Shira Rosenberg: 淤青是因为我们身体里的毛细血管破裂,血液渗漏到皮肤下面的组织中造成的。毛细血管非常脆弱,当我们撞到自己或皮肤受到撞击时,它们很容易破裂。血液从毛细血管中渗出,进入皮肤下面的组织。血液的颜色变化是因为血液中的氧气被周围的组织吸收,导致血液从红色变成蓝色。 之后,身体会启动机制来清除这些渗出的血液。在这个过程中,血液的颜色会发生变化,从蓝色变成紫色,再变成黄色,最终消失。 Anna Weigel: 如果你不喜欢淤青,可以采取一些措施来缓解。比如,让淤青部位休息,不要触碰或刺激它;可以用冰敷,每天几次,每次10到20分钟;还可以抬高淤青的部位,特别是手臂或腿部。但总的来说,淤青并不是什么大问题。

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Hey, friends. Do you have a young adult in your life who's looking to beef up their financial know-how? Then check out the new season of Financially Inclined, hosted by Janelle Espinal. This

This season, the show is tackling topics like how to align your values with your money decisions, the skill of negotiating, and what you can get out of internships. Financially Inclined is presented in partnership with Greenlight, the debit card and money app for teens. Greenlight helps teens learn to earn, save, spend wisely, and invest. Tune in to Financially Inclined wherever you find your podcasts. From the brains behind Brains On, this is the moment of um. ♪

Answering those questions that make you go... Moment of Um comes to you from APM Studios. I'm Anna Weigel. Um...

I'm getting really excited because my friends and I are having a party tonight. Do you want to know the theme? It's a fancy dress party, and here's how it works. Everyone has to wear that one outfit that they own that they hardly ever wear because it's too fancy. Maybe it's an old wedding dress. Maybe it's sequins. Maybe it's a baby blue tuxedo or hot pink heels. Whatever the style is, it's perfect, and it's happening tonight.

I'll be wearing a sleeveless purple romper that I just haven't had the occasion to wear yet, paired with my bright blue sandal clogs. In fact, I'm wearing them right now. They're making me really tall and... No! Big ol' bruise on my calf. You know, I bet this is because I tripped walking down the hill at a concert in the park this week. Shoot! I know it's not a big deal. It just makes me feel a little less fancy.

Why do we have to get bruises anyway? Listener Julia wanted to know. Hi, my name is Julia and I'm from New York, New York. My question is, why are bruises purple and blue and how do we get them? So when we have a bruise, it's because we get a little bit of a cut in one of the tubes that the blood travels in. My name is Shira Rosenberg and I'm a doctor for kids.

So blood travels through our body in these small tubes. The smallest of the tubes are called capillaries. When we hit ourselves or we knock our skin, the capillaries are really fragile and they have a small tear in them. And the liquid inside, which has the blood, escapes out of the capillary into the tissue below our skin.

So the blue color is because blood is blue when it doesn't have oxygen. And once the blood escapes from the capillary, the tissue, the muscles, the skin, all of the stuff in your body near the capillary uses the oxygen. So the blood becomes blue and not red. It stays there because it's not in the tube that moves it throughout the body. Your

Your body has all sorts of mechanisms for cleaning up the blood after it escapes from the capillary. And as it takes back the blood, the blood turns different colors. And that's why bruises go from blue to purple to yellow and then disappear altogether. Um, uh,

Now, if you have a bruise and you just hate it, there are a couple of things you can do. You can rest it. Don't pick at it or touch it or bother it. You can ice it with a cold pack or a bag of frozen veggies with a towel wrapped around them for 10 to 20 minutes a few times a day.

You can elevate the bruised area, which would especially work if it was an arm or a leg. But really, bruises aren't a huge deal. Plus, a purple romper with blue shoes sounds like it coordinates just perfectly with a bruise. And I do love a coordinated look. If you like this episode, take a second to subscribe wherever you listen to podcasts. And if you want to hear about environmentally friendly forms of transportation, check out the Smash Boom Best podcast where we have a whole episode all about bikes and skateboards.

If you have a moment of um question, we'd love to help you answer it. Drop us a line by going to brainson.org slash contact.

Moment of Um is produced by Molly Bloom, Rosie DuPont, Anna Goldfield, Ruby Guthrie, Mark Sanchez, Sandon Totten, and Anna Weigel. We had editing help from Erica Janik, production help from Emily Allen, Emily Henderson, and Manika Wilhelm, and engineering help from Alex Simpson. Our theme song is by Mark Sanchez. Our executive producer is Beth Perlman. The executives in charge of APM Studios are Chandra Kavati, Alex Schaffert, and Joanne Griffith.

Special thanks to Cassie Panning, Frank Rehm, John Lambert, and Rick Schwartz. See you next time and the next day and every weekday. Until then, um. Is there a teen in your life who needs a little extra help learning how to manage their finances?

Financially Inclined from Marketplace is a podcast you can trust to help Gen Z get serious about money. I'm the host, Janelia Espinal, and each week I talk to experts about essential and practical personal finance topics, like choosing a college that you can actually afford, finding internship opportunities, and how to start a business while you're still young. Let's make sure the next generation gets these financial lessons sooner than we did.

Listen to Financially Inclined wherever you get your podcasts.