Nine percent.
The average human body height to arm span ratio is approximately one to one. The arm to body ratio in a human is two to one.
The arm
there about 50 muscles in your arm and hand and i don't know how many are in the sholder
arm
The radius is one of the bones of the human arm.
75%
99 percent of the human body contains carbon, oxygen and hydrogen atoms. The composition of hydrogen in human body is 9.5 percent.
yo arm
arm
600to 650 are in the youth human body counting the arm and leg muscles.
.7%
Water.