Does exercise lead to a bigger heart? - The Naked Scientists
Apr 29, 2012 · Chris - Well actually, it does cause a bigger heart and it can happen for both good reasons and bad reasons. If you have a very high workload on your heart because you, for instance, …
Crocodile hearts | Interviews - The Naked Scientists
Jun 20, 2017 · Craig - Imagine a four chambered heart, just like a human heart - two atria, two ventricles. Blood returns from the body deoxygenated and it enters the right atrium. It then gets …
The cutting edge: dissecting the heart | Interviews
Jun 16, 2016 · The heart is made up of four chambers; two ventricles - the big pumps, and two atrias - the sort of smaller pumps really. Now all the chambers of this heart dilated so this is a very big heart. …
The bat with the enormous penis | Interviews
Dec 15, 2023 · It's also quite wide. And at the top of the penis, you have this heart shape, which is very strange because it doesn't look like something that will penetrate in anything. It doesn't look right. …
How do air sacs in the lungs work? | Science Questions
Jan 14, 2007 · In the wall of each balloon are tiny capillaries, which are very thin-walled blood vessels. The blood from your heart gets pumped through your lungs, around the walls of these tiny air sacs …
How Does Electrocution Kill You? - The Naked Scientists
Mar 15, 2017 · The heart is the most susceptible organ to electrical injury. If you are interested in reading more, several mechanisms of death from electric injury, include: ventricular fibrillation, …
25 years of the Human Genome Project | Podcasts
Jul 15, 2025 · Sidney Brenner, who's to get the Nobel Prize two years later, says, tomorrow, this is 25 years ago, almost to the day that we're sitting here, there's going to be a really big announcement in …
The health pros and cons of a vegan diet | Interviews
Oct 15, 2024 · And those are all good things for health. So if you adjust for those things in the analysis, there's not a huge difference. There's probably a lower risk of heart disease. And we can attribute …
Do we have a finite number of heartbeats? | Science Questions
Aug 12, 2012 · Chris - An Olympic athlete actually has a lower maximum heart rate than an untrained, unfit person like me because their heart has got so big because of the intense training regime that it …
What happens when we become scared? | Science Questions
Nov 18, 2012 · Your sympathetic nervous system becomes activated and this releases adrenaline into the bloodstream. Your pupils dilate, allowing more light into your eyes, your heart rate and your …