Question

Why is it necessary for people to have their blood examined before marriage?

Answer 1

Blood is a constantly circulating fluid providing the body with nutrition, oxygen, and waste removal. Blood is usually liquid, with numerous cells and proteins suspended in it, making blood "thicker" than pure water. The typical person has about 5 liters (more than a gallon) of blood.

Complete answer:
It is vital to have your blood examined before marriage in order to know that if you possess any virus, disease or anything which isn't normal you'll take necessary measurements beforehand.
But if you never examine your blood and after marriage you come to understand about some disease you had, you'll be risking quite your own life, also your partner's life, maybe your child's too. And also the biopsy will help us to be aware of genetic diseases.
If a carrier/sufferer of a genetic disease marries an individual who is additionally a carrier/ sufferer of the disorder, then there are chances that the disorder is going to be passed on to the off-springs. So as to stop this transmission, people should get their blood examined before marriage to understand if they're a carrier of any genetic disease or not.

Note:
Many genetic disorders result from gene changes that are present in essentially every cell within the body. As a result, these disorders often affect many body systems, and most can't be cured. However, approaches could also be available to treat or manage a number of the associated signs and symptoms.