Weightlifting, bicep curls in particular are good starts. They will help tone your arms and build muscles in your biceps and build strength to transition into more difficult and strenuous tasks.
The flexed arm hang is a measure of muscular endurance. The "flexed" in the exercise description refers to the muscles flexing to perform the exercise, and not to any flexibility in range of motion.
No easy ones, just hard, time consuming, and boring, hard work.
Move your arm in circles
you don't. Well, There are a lot of factors in winning an arm wrestle- such as having confidence. You also have the upper hand if your fore arm is longer than the opponents. But unless you have a significant amount of endurance or or muscular strength, because, frankly, arm wrestling is all about how much force your arm can exert. So build up your muscles too.
"Toning" is building muscle. The processes are one and the same. Generally though, when people say they want to have "toned" arms they mean they want their arms to have a firm, muscular appearance without really increasing their diameter. Simply chosing a less intense, less frequent lifting plan while reducing body fat through regular cardiovascular exercise and a sensible diet is all that's needed to achieve a "toned" appearance.
no the ulna is an arm bone
Not really you have to have enoght arm stregth to hold your own weight but loads of people who are not muscular can do cartwheels.
Muscular and Skeletal
The arm is not part of a single system; to construct an arm you need lots of systems, which includes the muscular, skeletal, circulatory, nervous, and integumentary systems.
Skeletal and muscular
This type of muscular dystrophy usually begins in early childhood, often with contractures preceding muscle weakness. Weakness affects the shoulder and upper arm originally, along with the calf muscles, leading to foot-drop
two muscular systems are crams and broken arm or leg. hope this is the answer you were looking for :)