A $1\mathrm{.}0$ mLmL syringe has an inner diameter of $5\mathrm{.}0$ mmmm $,$ a needle inner diameter of $0\mathrm{.}65$ mmmm $,$ and a plunger pad diameter $($where you place your finger$)$ of $1\mathrm{.}2$ cmcm$.$ A nurse uses the syringe to inject medicine into a patient's vein and so has to push against the patient's blood pressure$$which is $140$ over$106.$