For tattooing.. the dermis.
For poking around, the epidermis.
To calculate the force needed to pierce skin with a needle, you would need to consider factors like the needle's diameter, material, and sharpness. Bernoulli's principle and Young's modulus can also be used to estimate the force. However, performing actual experiments using materials similar to human skin may be the most accurate way to determine the force needed to pierce skin with a needle.
It is a kind of grass that can pierce though skin and clothing.
Yup. There is, a tattoo gun uses the needle to pierce you're skin and inject permenant ink.
With a hollow needle that creates an almost complete circular incision like cut in the skin.
No
A Needle.
Forms of intravenous injection and infusion began as early as 1670. However, Charles Gabriel Pravaz and Alexander Woodwere the first to develop a syringe with a needle fine enough to pierce the skin in 1853.
14 ga.
Sharpened bone
You probably shouldn't pierce your ear if you can't spell pierce.
Needles are used to create a sterile conduit between an animal patient and a medical device for use in either administering or collecting something. Needles are used to pierce the skin to inject vaccine subcutaneously as well as to pierce the skin and the wall of a blood vessel to collect blood for laboratory analysis.
Not exactly. If you get a surface bar (which I don't recommend), a needle is used to pierce the skin then the bar is put into place. With dermal anchors, either a punch, needle or scalpel is used to create a tiny pocket in which the anchor is placed.