In the beginning of the last century, scientists proved the existence of 4 groups of blood. How are inherited by child blood group?
The Austrian scientist Karl Landsteiner, mixing the serum of some people with red blood cells taken from the blood of others, found that for certain combinations of red blood cells and serum is “bonding” – the clumping of red blood cells and clots, while others have not.
Exploring the structure of red blood cells, Landsteiner discovered the particular substance. He divided them into two categories, A and b, highlighting the third, where he carried the cage in which they were not. Later, his disciples – A. von Decastella and A. Storli – found cells containing the markers and type at the same time.
The studies have any system of division into groups of blood, which was called AVO. This system we still use today.
I ( 0 ) – blood group is characterized by the absence of antigens A and b;
II ( A) is installed in the presence of antigen A;
III ( AB ) – antigen;
IV( AB ) – antigens A and B.
This discovery made it possible to avoid losses if transfusions caused by incompatibility between the blood of patients Continue reading
Communication between parents and children is often not easy. Parents often come complaints of child disobedience, and that the child belongs to radiusim his people without any respect. Not all parents are in authority among children. How to educate children to respect their parents, we will now discuss.
But follow these simple rules training, can still hope that the child will treat you with due measure of respect. First and foremost, the emphasis should be laid on discipline.
All loving parents are advised to pay attention to . where you can watch online your favorite cartoons and feature films – at any time convenient for the whole family!
How to educate children to respect their parents
When raising children it is extremely important to remember that it is the parents in the child’s fundamental traits. The value of the discipline is difficult to overestimate. In any family it would be welcome. But to discipline a child correctly.
Think about how often your child before a specific action asks you to give advice.
All children need a certain order in life. And discipline is most conducive to its formation. The more time Continue reading
In modern time, the computer is firmly entrenched in our lives, and today, to imagine the existence without a computer simply unrealistic. Practically every home has is a device that is used in different ways: for work, for study and for entertainment. But in addition to significantly facilitate our lives, the computer brings a range of problems. Often, the children and the computer are one. Moreover, it can be not only desktop, but also iPad or mobile phone. Teenagers abandoned the game in the fresh air, began to move less and spend more time in front of PC, lead a sedentary life. Company computer characters they are attracted to much more than real friends. These are the games for children on computer and regular communication in social networks leads subsequently to a computer addiction. That is, the virtual world replaces the world of real teenager.
Most computer addiction affects children insecure, closeted experiencing some difficulties in communicating with peers, by nature shy and having low self-esteem. The game allows them to escape reality, fulfill their desires, to feel strong, courageous, armed and experience brand new emotions. In the virtual world can “make yourself” the way you want: change your gender and age, Continue reading