Blood: blue, red, favorite food, or paint

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Science

Blood: blue, red, favorite food, or paint

To the world blood spendertag we present to you eight stories on the topic of blood, which we find amazing. You too? Take a look for yourself.

Men have more blood than women

Our blood makes up about seven to eight percent of body weight. An adult man who weighs 70 kg and 1.80 meters tall, has about five liters of blood in his body. Women are just as big and heavy, about half a Liter less. The exact amount depends on the size and body weight. Your exact blood volume, you can
here calculate.


The body replaces lost blood quickly

In the case of a blood donation, the doctor will take the blood donors, about half a Liter of blood, i.e. about ten percent of the blood volume. The body is then the removed part of the blood. The take for the different components of the blood. White blood cells, and platelets are modeled on platelets already after a few days, the liquid part of blood that contains, among other nutrients. Red blood cells take a little longer: you are only after about two months again in the same numbers as before the blood donation.

Ten percent of his blood can give the man without problems

Two liters of blood loss are usually fatal

The body loses after an injury, too much blood at once, he can no longer compensate for the loss. A blood loss of 40 percent – from about a two – Liter, no longer creates the heart, the circulation of the blood to maintain. Organs fail, and the Patient falls into a coma. Only a blood transfusion can help.


Why blood is red or not

All Vertebrates – including birds, fish and reptiles have red blood because their blood contains the blood pigment hemoglobin. This iron-containing protein that binds oxygen in the red blood cells and transports it through the body.

The blood of insects, spiders, clams, snails and cephalopods, as octopus is blue. Because your blood contains iron-containing hemoglobin, but instead, the copper-containing Hemocyanin, which fulfils the same tasks. Hemocyanin oxygen is bound, it acts blue. Without oxygen it is colorless.

Copper instead of iron, therefore, octopuses have blue blood

Why blood-metal smell, Japanese

Swedish and German researchers of faith to have the substance identified, which gives human blood its distinctive smell. It is called trans-4,5-Epoxy-(E)-2-Decenal. This volatile chemical compound attracts obvious predators such as wild dogs and tigers.


What blood poisoning is really

A red line that moves from the Hand in the direction of the heart – the people’s mouth thinks it’s a sign of blood poisoning. However, is not true. The red line indicates a Lymphangitis, an inflammation of the lymphatics. It is quite often, but it’s good to be treatable with antibiotics.

In the case of the real blood-poisoning, the
Sepsis, a inflammation of the entire body. The cause can be any infection in the body, such as a purulent Tooth, a pneumonia, a surgery wound infected with bacteria. Pathogens and their toxins spread via the blood vessels in the body. Sepsis can quickly lead to shock and death.

Grey blessed sight: a vampire Finch in the blood meal

Not only vampires drink blood

The vampire bat is familiar to almost everyone, because it is the only Mammal that feeds on blood. She lives in South and Central America. At night, she stalks to horses and cattle, biting them in the neck or legs and licks the protruding blood.

But also a variety of singing birds is come juice of Life on the taste of the rotens: the vampire Finch, a subspecies of the famous Darwin’s finches on the Galápagos. He drinks the blood of boobies. He’s around pecks for so long in the plumage of water-birds, until the blood flows. For the adult boobies, this practice is uncomfortable, but not dangerous. For the vampire she’s finches: On the Islands of Wolf and Darwin there is no fresh water. The finches take in so in an unusual kind of liquid.


Ox blood as a houses paint

Farmers painted their houses with ox-blood color. You let the blood of slaughtered oxen stick out, mixed the liquid Serum with lime and a few other ingredients and voila: Ready for the weather-resistant wall color. Particularly and wood plank floors estimated.