When you’re feeling sick, your immune system is fighting to get you well again.
The white blood cells act as an army of fighting cells, protecting your body from bad cells known as germs. White blood cells can capture germs and even swallow them.
Here’s what’s happening in your body if you’re feeling faint.
Most of the time, different parts of your nervous system work in balance. But sometimes things can get out of whack – and that's when you might end up experiencing what medics call syncope.
Activated platelets (purple) on their way to heal a wound.
Platelets heal wounds. But they also seem to play a paradoxical role in both promoting and inhibiting the growth of solid tumors.
Photo by Mikhail Vasilyev on Unsplash
Ants have something similar to blood, but it's called haemolymph. Some insects use it in unusual ways. When threatened by a predator, blister beetles can squirt haemolymph from their knees.
More than 80 per cent of the plasma Canada now uses for medical purposes comes from paid donation in the United States.
Canada suffers a shortage of vital blood plasma. Paying donors, through a non-profit like Canadian Blood Services, would secure a local supply without lining the pockets of corporate shareholders.
Marius Wernig, Thomas C. Südhof and their colleagues created these “Induced neuronal (iN) cells” from adult human blood cells.
Figuring out what causes diseases like autism, schizophrenia and depression is tricky. Now Stanford University researchers are turning blood into brain cells to study these diseases in a dish.
Is it always the same?
Your blood is red;
it's never blue.
Because of hemoglobin;
and the view through tissue.
New research shows green-blooded skinks have evolved multiple times, which could help lead to explanation as to why.
Blood has always been a symbol of life and has been thought to counteract the ageing process.
Mai Lam/The Conversation NY-BD-CC
Recent scientific studies have claimed that transfusions of blood from teenagers can help delay or reverse the ageing process. Do they stack up?
Our veins only appear blue through the skin, they’re actually red.
Blood is red, but our veins are blue. Or are they?
New mouse model study sheds light on why alcohol is so harmful.
Britain’s Prince Harry poses with Meghan Markle in the Sunken Garden of Kensington Palace on Nov. 27, 2017.
Much of the Harry and Meghan coverage has ignored the royal family's complicated history with race and "blood" and its insistence on continuing outdated traditions.
Menstrual cups are carving out a market beyond earth mothers.
Be it because of concerns over big femcare, landfill, cost, toxic ingredients or toxic shock syndrome, some menstruators seek solutions outside of the Kotex box. These are those choices.
Hepatitis is a public health concern globally.
Hepatitis viruses are serious infections that damage the liver. There is an urgent need to deal with increased Hepatitis B infections in Kenya.
Part of Jordan Eagles’s Blood Equality – Illuminations, 2017, an installation that uses imaged blood on plexiglass.
Contemporary artists from Judy Chicago to Stelarc have made art from blood. And an exhibition at Melbourne's new Science Gallery addresses our ambivalent attitudes to this life-giving fluid.
Our blood flows through our every organ and gives us life. So problems can have wide-ranging consequences.
An overview of the most common problems in our blood: bleeding disorders, clotting disorders and cancer.
Blood transfusions save lives - at least they do now. Here’s how an ancient experiment became a routine life saver.
Here we look at how blood transfusions started as an experiment four centuries ago, and became the modern-day life saver they are.
We know blood is vital for life, do we know why?
Illuminations: Blood Equality by Jordan Eagles (USA) Image credit: David Meanix and courtesy of artist as part of Science Gallery Melbourne’s BLOOD exhibition
Everything you never knew about the red stuff in your veins.
Millions of lives are saved by blood transfusions every year.
The guidelines don't go far enough to clarify what to do in the case of refusals by children.
Metabolism can change after weight loss.
Women measuring waist image via www.shutterstock.com.
Weight loss often leads to declines in our resting metabolic rate – how many calories we burn at rest – which makes it hard to keep the weight off. So why does weight loss make resting metabolism go down?