Question

how blood preserved in blood packets??

Answer 1

Glycerol which termeates red cells fairly rapidly during freezing is most effective in protecting the human redcells. Frozen red cells are primarily used for autologous transfusion and the storage of rare groupblood. For freezing red cells a cryoprotective agent is added to red cells that are less than 6 days old.
ग्लिसरॉल जो लाल कोशिकाओं को काफी तेजी से ग्रहण करता है, वह मानव लाल कोशिकाओं की सुरक्षा में सबसे अधिक प्रभावी होता है।जमी हुई लाल कोशिकाओं मुख्य रूप से यू हैं

Answer 2

First the blood group is chexked and then they classify the blood on the basis of reports after that they take the blood from iur body through small pipes