Since everyone’s body is different and we all have different sizes in muscle, fat, bones and even blood vessels and the location of those could vary slightly from person to person, how do doctors know exactly how deep to inject a syringe.
In: Biology
Well you’ve got a bit of a false assumption there.
Everybody’s body is slightly different, but the layout is almost always practically identical.
So doctors can use common landmarks on the body regardless of size, fat, and muscle composition to guide injections.
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