The Blood-brain Barrier (BHE) The blood-brain barrier (BHE) is a system of protection against the entry of foreign substances formed by endothelial cells that line the capillaries of the brain. Functions of the Blood-brain Barrier It is used to control and restrict the passage of toxic substances between blood circulation and cerebral fluid.
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Infographic vector created by freepikIf we could reduce the population of the Earth to a small village of exactly 100 inhabitants, maintaining the proportions currently existing, it would be something like this: There would be 57 Asians, 21 people from the American continent (including north and south) , 14 Europeans and 8 Africans 52 would be women 48 men 70 would not be white 30 would be white 70 non-Christians 30 Christians 89 heterosexuals 11 homosexuals 6 people would own 59% of the wealth of the entire village and 6 would be Americans Of the 100 people, 80 would live in subhuman conditions and 70 would be unable to read 50 would suffer from malnutrition 1 person would be about to die 1 baby would be about to be born Only 1 (yes, only 1) would have a college education In this village there would be 1 person with a computer
Background vector created by freepik My friend Carmen and I are passionate about riddles and winter sports. The other day we went skiing and when I got on the cable car I came up with the following riddle: At the time I was sitting in cabin number 98, I crossed with chair number 105, while my friend Carmen who occupied cabin No. 241 crossed with No. 230.
The next riddle, very simple, is so stripped of mathematical difficulties that I hesitate to present it. However, like Edwin Markham's celebrated poem, I think it opens the way for interesting discussions. It seems that, in exchange for five dollars, Hobbs and Nobbs agreed to plant a potato field for the farmer Snobbs.
10 coins are placed on the table, until we have 3 rows of four coins, you have to change the position of only two of the coins until you get 5 rows of 4 coins each. Are you able to get it? Solution With this distribution we have the ten coins distributed so that we have 5 rows with 4 coins each:
A different vision, conception and interpretation of objects found in nature. Solution Benoît Mandelbrot was the main creator of Fractal Geometry. Fractal geometry is distinguished by a more abstract approach to the dimension that characterizes conventional geometry.
We have two identical solid cubes. Is it possible to make a hole in one of the cubes so that the other cube can pass through? Solution The solution involves making a hole slightly larger than the width of the cube by looking at it from one of its vertices, as shown in the image, so that the other cube can pass through it without problems.
Look at the two figures that appear in the images. One of them is called Booba and the other is called Kiki. Could you tell me which is which? Solution This is a psychological experiment devised by Wolfgang Köhler in which the subject is asked to say which of these figures is called Booba and which Kiki. 95% of people assign the name Kiki to the orange angular figure and Booba to the violet rounded figure.