We all have tiny hairs inside our blood vessels that conform to the flow of your blood
09/03/2017 // Russel Davis // Views

A study published on the Nature Physics website revealed that the human body is covered on the inside with soft, microscopic carpets of hair -- which include the tastebuds, the microvilli in our stomachs and protein strands throughout our blood vessels -- that move with the currents of fluids that they are immersed in.

In order to examine the behavior of these microscopic hairs toward fluid flow, a team of researchers at the Massachusetts Institute of Technology fabricated soft beds of hair with varying density, angle, and elasticity. The scientists then used a rheometer to measure the hairs' impedance or resistance to fluid flow.

The research team found that stiff hairs stay upright when liquid velocity is too low during a fluid flow. On the other hand, the hairs are more susceptible to drooping if the velocity is too high.

However, the researchers noted that certain hairs with distinct angle or elasticity may exhibit an asymmetric drag response during a fluid flow. This means these angled hairs straighten when fluid is flowing against them. During this state, the hairs can slow fluid flow by serving as a temporarily raised gate.

"There's been a lot of work done at the large scale, studying fluids like wind flowing past a field of grass or wheat, and how bending or changing the shape of an object affects impedance, or fluid flow. But there's been very little work at small scales that can be applicable to biological hairs...What is surprising is what happened with angled hairs [is that] we saw a difference in impedance depending on if fluid was flowing with or against the grain. Basically, hairs were changing shape, and changing the flow around them," lead author José Alvarado explained in a Phys Org article.


Potential implications in health care

The discovery of hairs that possess asymmetric drag response may help engineers to design microfluidic devices lined with angled hair that may passively direct fluid flow across a chip.

Study co-author Anette Hosoi said microfluidic equipment such as hydraulic diodes are an important component in the development of complex hydraulic systems that may get the job done. (Related: Swimming nanobots developed that can hunt down and destroy bacteria in water.)

Hosoi argued that it will be challenging to design equipment possessing functionalities that can be switched on very small scales. However, the expert noted that these angled hairs can be utilized to create a fluid diode that can switch between high and low resistance during fluid flows from one direction to another. The expert also stressed that computers and mobile phones were developed through the invention of cheap, solid-state, small-scale electronics.

"On hydraulic systems, we have not seen that kind of revolution because all the components are complex in themselves. If you can make small, cheap fluid pumps, diodes, valves, and resistors, then you should be able to unleash the same complexity we see in electronic systems, in hydraulic systems. Now the solid-state hydraulic diode's been figured out," Hosoi told the Science Daily website.

Sources include:



Take Action:
Support Natural News by linking to this article from your website.
Permalink to this article:
Embed article link:
Reprinting this article:
Non-commercial use is permitted with credit to NaturalNews.com (including a clickable link).
Please contact us for more information.
Free Email Alerts
Get independent news alerts on natural cures, food lab tests, cannabis medicine, science, robotics, drones, privacy and more.
App Store
Android App
eTrust Pro Certified

This site is part of the Natural News Network © 2022 All Rights Reserved. Privacy | Terms All content posted on this site is commentary or opinion and is protected under Free Speech. Truth Publishing International, LTD. is not responsible for content written by contributing authors. The information on this site is provided for educational and entertainment purposes only. It is not intended as a substitute for professional advice of any kind. Truth Publishing assumes no responsibility for the use or misuse of this material. Your use of this website indicates your agreement to these terms and those published here. All trademarks, registered trademarks and servicemarks mentioned on this site are the property of their respective owners.

This site uses cookies
Natural News uses cookies to improve your experience on our site. By using this site, you agree to our privacy policy.
Learn More
Get 100% real, uncensored news delivered straight to your inbox
You can unsubscribe at any time. Your email privacy is completely protected.