What is actually in one drop of blood?
Quite a lot, it turns out!
In each drop of blood,roughly 60% is plasma, a liquid containing proteins, nutrients, hormones, and waste products— you know, all the things that blood is so famous for carrying around— dissolved in water.
The other 40% of your blood is made of cells. The most abundant are oxygen-bearing red blood cells (orerythrocytes, if you can pronounce that).Each drop of blood contains around 5 million red blood cells!
But red blood cells aren’t the only cells in that drop of blood. You’ll also find7,000 to 24,000 white blood cells, orleukocytes, which play a key role in your immune system’s ability to protect your body from infection and fight off disease. There are also around 250,000 platelets, orthrombocytes, which promote blood clotting. should you be bleeding anywhere in your body.
Answered by Claire R., Expert Leader.
Edited by Dylan S.
SciNote is quickly become one of my favourite Science blogs. Excellent stuff.
Hey guys, I just found out that the NOAA space weather prediction centre has a real time map of the aurora’s that are going on right now due to the X-class solar flare from the sun.
It shows the areas that the aurora is visible from and is updated every 30 seconds.
WOW! I didn’t have a clue about this resource. Kudos to Tynan Plillips for the find.
Is it possible that outside of our frame of reference, we are traveling at the speed of light, but we don’t sense it because everything else in our frame of reference (the observable universe) is also traveling at the speed of light?
Asked by the-apiarist
Great question! The Principal of Invariant Light Speed, one of Einstein’s postulates, states that the speed of light in a vacuum is constant no matter the frame of reference. Therefore, no matter the observer, the speed of light provides the same limitations on motion.
In short, probably not. It isn’t entirely impossible, but our current knowledge of the universe makes it highly improbable.
To read more about the Principle of Invariant Light Speed, please click here.
What do you think? Let us know by reblogging or commenting on this post.
Answered by Olivia D., Expert Leader
Edited by Ashlee R.
Invariant light speed is such a counter-intuitive concept so misconceptions about the things related to the speed of light is quite common. But people who are much smarter than us can explain these concepts to us in plain language, thankfully.