Cocaine normally stays in the system for approximately 48 hours. Although the method of administration and the dose administered affects how long it takes for the body to metabolize this drug. When coca leaves are chewed, absorption time is around 30 minutes.
The muscles that provide the movement for the shoulder and upper arm include the anterior muscles in the front, the posterior muscles in the back, and the shoulder muscles that are sort of in between. Pectoralis major: This muscle has two heads, or sections of muscle tissue, and covers much of the front of the thoracic cage.
Merge this question into. Split and merge into it. Answer by Gogmorgoaway. Confidence votes 89. Your arm has quite a few muscles, but the ones in your upper arm are the biceps (the one you flex when you make a muscle) and the triceps, which is on the back of the upper arm.