Why do they cotton swab the guy's arm with rubbing alcohol before a lethal injection?

To make sure its clean so when they reuse the needle it doesn't give the next guy aids before killing him.

Per wikepedia: the arm of the condemned is swabbed with alcohol before the needle is inserted. along with its antiseptic use, the alcohol also causes the blood vessels to rise to the skin's surface, making it easier to insert the needle. the needles and equipment used are also sterilized. one reason for this is because the needles are standard medical products that are sterilized during manufacturing. also, there is a chance that the prisoner could receive a stay of execution after the needles have been inserted as happened in the case of james autry in october 1983 (he was executed eventually on 14 march 1984). finally, it would also be a hazard for those handling unsterile equipment.

Ithink it is the last one sorry if i’m wrong

Muscles in the body us with a lot of things for example, if i wanted to lift a heavy box and had no muscle i would just collapse where i was because of the fact muscles hold us together. overall they are 650 muscle in the human body, all of them have different purposes and ways to keep us together. there are three types of muscle in the body skeletal, smooth, and cardiac muscle. skeletal muscle are attached to the bone and with movement. smooth muscle, this is found in the wall of our organs, such as our stomach, this muscle with movement   as well, without this muscle, we would only be allowed to eat small amounts. the cardiac muscle is the heart muscle and probably the most important one. these are only found in the walls of the heart and the heart pump blood to the other parts of your body. we have two different types of muscle fibers, slow twitch and fast twitch. slow twitch muscles enable long-endurance feats such as distance running. fast twitch fatigue faster but are used in powerful bursts of movements like sprinting. there are three different types of muscle contractions concentric, eccentric, isometric. concentric contraction causes muscles to shorten, thereby generating force.   eccentric contractions cause muscles to elongate in response to a greater opposing force. isometric contractions generate force without changing the length of the muscle.: //athleticquickness.com/muscle-contraction-types-part-1/