Question

1. How is a a syringe used during blood tests?​

Answer 1

A syringe is just a hollow tube with a plunger at one end. After the needle is inserted into the vein (usually), the plunger is moved distally from the needle end, (pull the plunger back), and a negative air space is created that has less pressure that the vein.

The blood will, like water, find it's way to the easiest escape route, i.e., the hollow tube, and the blood will flow into the syringe.

Hope it'll help you :)

Answer 2

Answer:

hope it will be helpful for you