The immune system (or immunity) can be divided into two types - innate and adaptive immunity. This video has an immune system animation. The innate immune system consists of defenses against infection that are activated instantly as a...

To protect your vision, the human eye gets something called immune privilege. It is basically a license that the bodys immune system gives to some organs, like the eyes and the brain. Immune privilege limits the response of the immune...

The jellyfish is one weird sea animal. What makes it even weirder is that it doesn’t have a brain or a heart. Though it doesn’t have a brain, it does have a nervous system in the form of nerve nets and some have a structure called a...

Blood pressure (BP) is the force with which the heart pumps blood to maintain regular blood flow through the body. This force exerts pressure on the walls of the blood vessels, primarily the arteries. A study published in 1995 recorded...

Fishes survive underwater pressure as they do not breathe through their lungs. Therefore, they do not have air pockets that can be compressed due to the high pressures. However, fish arent the only creatures found at such incredible...

This video was sponsored by Brilliant. To try everything Brilliant has to offerfreefor a full 30 days, visit http://brilliant.org/ScienceABC/. The first 200 of you will get 20% off Brilliants annual premium subscription. Your body...

Donating blood can lead to weight loss, but this loss is not significant. As covered in this video, the average donation is 1 pint of blood, which weighs about 1 pound; so right off the bat, youre walking out of the donation center 1...

Whether fish get thirsty depends on the fish you look at. Fish that live in freshwater have different physiology to deal with their environment than fish in salty seawater. These physiological differences dictate whether fish need to...

There’s a common movie trope of an actor wiping their fingerprints off a gun. It seems like a simple wipe with a cloth eliminates any trace of a criminal’s guilt, but that isn’t actually the case! Scientists have developed a method that...

The circulatory system is a vast, complex network of blood vessels that serve as highways for transporting blood which contains life-sustaining molecules, such as nutrients, gasses, hormones and waste products, to the various organs of...

It is better to sip water rather than chugging it down. Thats why certain water bottles have a narrower opening than required. Imagine a case where you have a sudden urge to drink water (obviously, youre thirsty). You gulp down a glass...

Although kidneys are clearly important for survival, they are not essential, and this is particularly true if only one kidney is present. Some people are born without one of their kidneys, a condition called renal agenesis. Some other...

Experts use veins to draw blood for blood testing, blood donation, and more because the structure and position of veins make it easier to draw blood out of as compared to arteries. It may also be dangerous to draw blood from arteries.

Sitting for long periods can cause blood clots due to impeded flow of blood. Sitting without moving much can cause the blood to clot according to the effects of gravity. This doesn’t happen during sleep since we do move our bodies during...

We feel hungry even after overeating the previous night because through the night our blood sugar levels drop. The insulin released after the heavy meal causes the body to use up or store the glucose. Additionally, our stomach is empty...

When our body sustains a wound, new cells are formed near the edges of the injury and then move down to the base of the wound. Once these cells have migrated to the center of the wound, they connect with other cells nearby. Once this...

Meet Marsha and Ed, the duo behind Distortions Unlimited, crafting monsters, zombies, and dragons, blending love with the art of fear.Love and monsters, a life crafting fearLove and monsters, a life crafting fear

The cold air produced by ACs is not inherently harmful. However, you may start to see symptoms of air conditioning sickness if your AC fails to restrain the bacteria, mold, fungi, dander, etc., that are thriving in the air-conditioned...

The pressure that blood exerts against the walls of blood vessels. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning images and concise textual definitions. Twig Science Glossary Films reinforce...

A substance in which the concentration of oxygen is elevated is said to be oxygenated. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning images and concise textual definitions. Twig Science...

A protein found in muscle tissue that performs a similar role to haemoglobin in the blood, as a carrier of oxygen that releases it to cells when required A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using...

Microscopic air sacs in the lungs where gas exchange takes place between blood and the atmosphere. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning images and concise textual definitions. Twig...

A protein found in red blood cells that binds and transports oxygen in the blood. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning images and concise textual definitions. Twig Science Glossary...

A substance that has had oxygen removed from it in some way. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning images and concise textual definitions. Twig Science Glossary Films reinforce...