Can you imagine what the world would look like today if humans didn’t have arms?
We take our arms for granted, but they are extremely useful.
How much does an arm weigh?
The weight will ultimately depend on the overall weight of a person.
A female weighing 135 pounds (59 kg), will have an arm that weighs approximately 7 pounds (3.2 kg).
A male who weighs 190 pounds (86 kg), will have an arm that weighs in at around 12 pounds (5.4 kg).
The upper arm contains two large muscles which are the biceps and the triceps. A forearm and hand can rotate greater than 180 degrees thanks to the elbow joint.
You may be surprised to know that your fingers do not contain any muscles.
Facts About Arm Bones
There are three long bones in an arm. The lower arm contains the radius and ulna bones. These two bones support both sides of the wrist.
The bone in the upper arm is the humerus or the “funny” bone.
Human hands contain 26 bones.
There are 8 carpal bones in an arm which are the triquetrum, scaphoid, hamate, lunate, capitates, pisiform, trapezoid and trapezium.
~ Fun Fact ~
The muscles in the lower arm provide the power for hands to grip tightly.