According to the dictionary, blood is a liquid fabric of cardiovascular system of vertebrate animals and the person. As many know, it consists of plasma, erythrocytes, leukocytes and тромбоцитов. This red liquid transfers gases and other dissolved substances which necessary for a metabolism and are forming as a result of exchange processes. By the way, red colour of blood is defined by existence in erythrocytes of a pigment of haemoglobin (it is the protein containing iron).
Speed of movement of blood in vessels of a human body reaches 15-20 centimetres a second in an aorta and is slowed down to 0,5 millimetres a second in capillaries. The capillary is the smallest vessel which average diameter makes 5-10 microns. It is difficult to imagine so small size therefore for descriptive reasons we will draw an analogy with a human hair: the capillary is thinner than it in 50 times. Through the narrowest gleam only one blood little body can squeeze into 0,008 millimetres - an erythrocyte (0,007 millimetres in diameter). Meanwhile, the smallest сосудиками all our body "is penetrated", and, if to extend them to one line, its total length at the adult person will make about 100 thousand kilometres. Besides, for descriptive reasons: from New York to Moscow only 7500 km. In order that it was possible to imagine better quantity of capillaries in an organism, we will remind that each of them separately has length about 0,5 millimetres.
Colour. We already have managed to tell a couple of words about colour of blood, and now we will stop on this question in more detail. In the nature many chemical compounds incorporating oxide iron, gain red colour. At all vertebrate animals, and also at an earthworm, bloodsuckers, a room fly and some molluscs such oxide iron is in haemoglobin, therefore blood red. However there are sea worms, whose vital liquid is saturated not haemoglobin, and absolutely other substance - hlorokruoriny. It contains zakisny, instead of oxide iron because of what blood of the described animals becomes green. At river crayfish, scorpions, spiders, octopuses, octopuses and cuttlefishes blood at all the dark blue. The matter is that instead of haemoglobin it contains гемоцианин at which there is a copper. Incorporating to air oxygen, гемоцианин becomes blue, and giving oxygen to fabrics, becomes colourless a little. As a result of it, at animals in arteries dark blue blood, and in veins the blue flows. But there is more to come. For example, at sea astsidiya blood colourless, as in its basis - the haemo vanadium containing ions of vanadium. At some invertebrate animals oxygen also transfers not haemoglobin, and containing in 5 times more gland of squirrels гемэритрин. It gives blood a violet-red shade.
Figures. The average amount of blood in a body of the adult person of 6-8 % from lump, that is volume of this liquid in an organism of the adult man makes about 5000-6000 ml. At rest blood is distributed in our body as follows: a quarter of total amount is in muscles, a quarter more - in kidneys, 15 % - in vessels of walls of intestines, 10 % - in a liver, 8 % - in a brain, 4 % - in coronal vessels of heart, 13 % - in vessels easy and other bodies.
Cinema. According to some information, liquid in green cocoes can be used as substitute of plasma of blood. However while scientific minds solve this question, experts in the field of a cinema are occupied with something more interesting - they generously spill fake blood from screens. By the way, for shooting "Shout" was required about 25 ведёр to red liquid (190 litres), and on a dilogy «to Kill Bill» it was obvious a little so founders have not stinted and "have bathed" the heroes in 10 household baths of scarlet properties (1700 litres).